Trial Outcomes & Findings for Immunogenicity and Safety Study of a GlaxoSmithKline Biologicals' Candidate Influenza Vaccine in Healthy Children (NCT NCT00985790)

NCT ID: NCT00985790

Last Updated: 2018-09-21

Results Overview

Titers are presented as geometric mean titers (GMTs). The reference cut-off value was 1:10. The 3 influenza strains assessed were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2) and Flu B/Brisbane/60/08 Victoria (VICT).The POST results were the primary outcome variables.

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

599 participants

Primary outcome timeframe

At Day 0 [PRE] and at 28 days post last vaccination (Day 28 or Day 56) [POST]

Results posted on

2018-09-21

Participant Flow

A total of 599 subjects were enrolled in the study, and assigned to either the GSK2321138A Group (298 subjects) or the Fluarix Group (301 subjects). Duration of study was of approximately 6 months for each subject.

For demography and safety, results are presented as per the main study groups. For some outcome measures and where relevant, subjects as in these 2 main groups are split according to their priming status at study entry.

Participant milestones

Participant milestones
Measure
GSK2321138A Group
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Overall Study
STARTED
298
301
Overall Study
COMPLETED
291
293
Overall Study
NOT COMPLETED
7
8

Reasons for withdrawal

Reasons for withdrawal
Measure
GSK2321138A Group
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Overall Study
Withdrawal by Subject
1
1
Overall Study
Lost to Follow-up
6
7

Baseline Characteristics

Immunogenicity and Safety Study of a GlaxoSmithKline Biologicals' Candidate Influenza Vaccine in Healthy Children

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
GSK2321138A Group
n=298 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=301 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Total
n=599 Participants
Total of all reporting groups
Age, Continuous
31.4 months
STANDARD_DEVIATION 8.46 • n=5 Participants
31.6 months
STANDARD_DEVIATION 8.29 • n=7 Participants
31.5 months
STANDARD_DEVIATION 8.38 • n=5 Participants
Sex: Female, Male
Female
138 Participants
n=5 Participants
147 Participants
n=7 Participants
285 Participants
n=5 Participants
Sex: Female, Male
Male
160 Participants
n=5 Participants
154 Participants
n=7 Participants
314 Participants
n=5 Participants

PRIMARY outcome

Timeframe: At Day 0 [PRE] and at 28 days post last vaccination (Day 28 or Day 56) [POST]

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

Titers are presented as geometric mean titers (GMTs). The reference cut-off value was 1:10. The 3 influenza strains assessed were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2) and Flu B/Brisbane/60/08 Victoria (VICT).The POST results were the primary outcome variables.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=193 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=193 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against the 3 Fluarix Vaccine Strains.
H1N1, PRE
22.2 titers
Interval 17.2 to 28.7
21.6 titers
Interval 16.7 to 28.0
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against the 3 Fluarix Vaccine Strains.
H1N1, POST
173.8 titers
Interval 141.4 to 213.5
176.9 titers
Interval 143.3 to 218.5
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against the 3 Fluarix Vaccine Strains.
H3N2, PRE
18.6 titers
Interval 14.9 to 23.2
20.8 titers
Interval 16.5 to 26.2
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against the 3 Fluarix Vaccine Strains.
H3N2, POST
120.7 titers
Interval 101.2 to 143.9
130.4 titers
Interval 108.0 to 157.5
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against the 3 Fluarix Vaccine Strains.
VICT, PRE
8.7 titers
Interval 7.3 to 10.2
9.0 titers
Interval 7.7 to 10.6
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against the 3 Fluarix Vaccine Strains.
VICT, POST
61.9 titers
Interval 48.7 to 78.6
66.6 titers
Interval 52.4 to 84.7

SECONDARY outcome

Timeframe: At Days 0 and 28.

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

Titers are presented as geometric mean titers (GMTs). The reference cut-off value was 1:10. The 4 influenza strains assessed were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the primed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=94 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=95 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H1N1. Day 0
40.3 titers
Interval 27.0 to 60.2
36.5 titers
Interval 24.3 to 54.9
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H1N1. Day 28
117.0 titers
Interval 83.2 to 164.5
124.4 titers
Interval 89.8 to 172.4
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H3N2, Day 0
22.8 titers
Interval 16.7 to 31.2
21.7 titers
Interval 16.0 to 29.5
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H3N2, Day 28
85.2 titers
Interval 64.8 to 112.0
83.0 titers
Interval 63.6 to 108.2
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
VICT, Day 0
8.9 titers
Interval 7.2 to 11.0
9.7 titers
Interval 7.7 to 12.4
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
VICT, Day 28
38.7 titers
Interval 26.2 to 57.1
44.0 titers
Interval 29.6 to 65.2
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
YAMA, Day 0
29.3 titers
Interval 23.0 to 37.4
37.7 titers
Interval 29.8 to 47.8
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
YAMA, Day 28
243.6 titers
Interval 198.1 to 299.6
127.2 titers
Interval 106.1 to 152.3

SECONDARY outcome

Timeframe: At Days 0, 28 and Day 56

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

Titers are presented as geometric mean titers (GMTs). The reference cut-off value was 1:10. The 4 influenza strains assessed were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the unprimed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=192 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=198 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H1N1, Day 0
14.7 titers
Interval 11.8 to 18.4
12.8 titers
Interval 10.5 to 15.7
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H1N1, Day 28
173.1 titers
Interval 113.1 to 264.8
161.6 titers
Interval 103.9 to 251.4
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H1N1, Day 56
253.1 titers
Interval 203.4 to 314.8
249.0 titers
Interval 192.5 to 321.9
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H3N2, Day 0
17.7 titers
Interval 14.1 to 22.1
17.9 titers
Interval 14.1 to 22.6
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H3N2, Day 28
99.3 titers
Interval 64.8 to 152.2
84.2 titers
Interval 54.1 to 131.2
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H3N2, Day 56
168.1 titers
Interval 136.6 to 206.7
202.1 titers
Interval 158.6 to 257.5
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
VICT, Day 0
7.8 titers
Interval 6.7 to 9.2
8.7 titers
Interval 7.5 to 10.3
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
VICT, Day 28
26.5 titers
Interval 17.7 to 39.7
34.6 titers
Interval 22.4 to 53.6
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
VICT, Day 56
97.2 titers
Interval 74.9 to 126.1
99.6 titers
Interval 76.7 to 129.4
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
YAMA, Day 0
9.1 titers
Interval 7.7 to 10.7
9.9 titers
Interval 8.4 to 11.8
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
YAMA, Day 28
97.0 titers
Interval 64.7 to 145.4
30.0 titers
Interval 21.3 to 42.1
Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
YAMA, Day 56
311.1 titers
Interval 255.4 to 379.1
42.2 titers
Interval 30.6 to 58.1

SECONDARY outcome

Timeframe: At Days 0 and 28

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

A seropositive subject was defined as a vaccinated subject with serum Hemagglutination Inhibition (HI) titer ≥ 1:10. The 4 assessed influenza strains were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the primed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=94 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=95 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 0
58 Participants
54 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 28
83 Participants
87 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 0
60 Participants
59 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 28
88 Participants
87 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
VICT, Day 0
26 Participants
28 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
VICT, Day 28
62 Participants
66 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 0
73 Participants
80 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 28
93 Participants
94 Participants

SECONDARY outcome

Timeframe: At Days 0, 28 and 56

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

A seropositive subject was defined as a vaccinated subject with serum Hemagglutination Inhibition (HI) titer ≥ 1:10. The 4 assessed influenza strains were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the unprimed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=192 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=198 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 0
75 Participants
71 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 28
83 Participants
84 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 56
99 Participants
96 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 0
85 Participants
82 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 28
74 Participants
78 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 56
99 Participants
98 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
VICT, Day 0
30 Participants
42 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
VICT, Day 28
51 Participants
61 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
VICT, Day 56
96 Participants
94 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 0
45 Participants
57 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 28
75 Participants
57 Participants
Number of Seropositive Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 56
98 Participants
70 Participants

SECONDARY outcome

Timeframe: At Day 28

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer \<1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 4 assessed influenza strains were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the primed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=94 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=95 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 28
30 Participants
39 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 28
48 Participants
46 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
VICT, Day 28
46 Participants
42 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 28
82 Participants
40 Participants

SECONDARY outcome

Timeframe: At Days 28 and 56

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer \<1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 4 assessed influenza strains were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the unprimed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=96 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=101 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 28
63 Participants
74 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 56
81 Participants
89 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 28
55 Participants
54 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 56
79 Participants
75 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
VICT, Day 28
34 Participants
40 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
VICT, Day 56
77 Participants
85 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 28
59 Participants
40 Participants
Number of Seroconverted Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 56
90 Participants
42 Participants

SECONDARY outcome

Timeframe: At Day 28

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

The seroconversion factor (SCF) was defined as the fold increase in serum Hemagglutination Inhibition (HI) geometric mean titers (GMTs) post vaccination compared to Day 0. The 4 assessed influenza strains were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the primed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=94 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=95 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H1N1, Day 28
2.9 fold change
Interval 2.3 to 3.6
3.4 fold change
Interval 2.7 to 4.2
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H3N2, Day 28
3.7 fold change
Interval 3.1 to 4.5
3.8 fold change
Interval 3.1 to 4.7
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
VICT, Day 28
4.4 fold change
Interval 3.3 to 5.8
4.5 fold change
Interval 3.4 to 6.0
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
YAMA, Day 28
8.3 fold change
Interval 6.8 to 10.1
3.4 fold change
Interval 2.8 to 4.0

SECONDARY outcome

Timeframe: At Days 28 and 56

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

The seroconversion factor (SCF) was defined as the fold increase in serum Hemagglutination Inhibition (HI) geometric mean titers (GMTs) post vaccination compared to Day 0. The 4 assessed influenza strains were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the unprimed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=96 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=101 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H1N1, Day 28
9.9 fold change
Interval 7.0 to 14.1
12.7 fold change
Interval 9.1 to 17.7
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H1N1, Day 56
19.8 fold change
Interval 15.4 to 25.6
19.2 fold change
Interval 15.2 to 24.2
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H3N2, Day 28
4.9 fold change
Interval 3.7 to 6.3
5.1 fold change
Interval 3.9 to 6.7
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
H3N2, Day 56
11.1 fold change
Interval 9.0 to 13.7
10.3 fold change
Interval 8.3 to 12.9
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
VICT, Day 28
3.6 fold change
Interval 2.7 to 5.0
3.8 fold change
Interval 2.9 to 5.0
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
VICT, Day 56
11.3 fold change
Interval 9.4 to 13.6
12.1 fold change
Interval 9.8 to 14.8
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
YAMA, Day 28
9.9 fold change
Interval 6.9 to 14.0
3.4 fold change
Interval 2.5 to 4.5
Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 4 Strains of Influenza Disease.
YAMA, Day 56
35.1 fold change
Interval 27.6 to 44.6
3.7 fold change
Interval 2.9 to 4.8

SECONDARY outcome

Timeframe: At Days 0 and 28

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

A seroprotected subject was defined as a vaccinated subject with serum Hemagglutination Inhibition (HI) titer ≥ 1:40. The 4 assessed influenza strains were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the primed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=94 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=95 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 0
48 Participants
45 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 28
73 Participants
78 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 0
39 Participants
36 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 28
75 Participants
80 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
VICT, Day 0
16 Participants
20 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
VICT, Day 28
50 Participants
52 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 0
56 Participants
62 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 28
91 Participants
90 Participants

SECONDARY outcome

Timeframe: At Days 0, 28 and 56

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

A seroprotected subject was defined as a vaccinated subject with serum Hemagglutination Inhibition (HI) titer ≥ 1:40. The 4 assessed influenza strains were the FLU A/Brisbane/59/07 (H1N1), Flu A/Uruguay/716/07 (H3N2), Flu B/Brisbane/60/08 Victoria (VICT) and Flu B/Brisbane/3/07 Yamagata (YAMA). This outcome only covers the results for the unprimed groups.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=192 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=198 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 28
67 Participants
53 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 56
98 Participants
59 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 0
58 Participants
54 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 28
76 Participants
78 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H1N1, Day 56
95 Participants
94 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 0
74 Participants
70 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 28
64 Participants
61 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
H3N2, Day 56
96 Participants
94 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
VICT, Day 0
25 Participants
35 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
VICT, Day 28
36 Participants
41 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
VICT, Day 56
84 Participants
88 Participants
Number of Seroprotected Subjects Against 4 Strains of Influenza Disease.
YAMA, Day 0
37 Participants
40 Participants

SECONDARY outcome

Timeframe: During the 7-day follow-up period (Days 0 to 6) after any vaccination

Population: The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects with the symptom sheet completed.

Assessed solicited local symptoms were pain, redness and swelling at the injection site. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = cried when limb was moved/spontaneously painful. Grade 3 redness/swelling = redness/swelling spreading beyond 50 millimeters (mm) of injection site.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=293 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=298 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Subjects With Any and Grade 3 Solicited Local Symptoms.
Any Pain
125 Participants
116 Participants
Number of Subjects With Any and Grade 3 Solicited Local Symptoms.
Grade 3 Pain
4 Participants
1 Participants
Number of Subjects With Any and Grade 3 Solicited Local Symptoms.
Any Redness
31 Participants
34 Participants
Number of Subjects With Any and Grade 3 Solicited Local Symptoms.
Redness >50 mm
0 Participants
0 Participants
Number of Subjects With Any and Grade 3 Solicited Local Symptoms.
Any Swelling
27 Participants
24 Participants
Number of Subjects With Any and Grade 3 Solicited Local Symptoms.
Swelling >50 mm
0 Participants
0 Participants

SECONDARY outcome

Timeframe: During the 7-day follow-up period (Days 0 to 6) after any vaccination

Population: The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects with the symptom sheet completed.

Assessed solicited general symptoms were drowsiness, irritability, loss of appetite and temperature (defined as axillary temperature equal to or above 37.5 degrees Celsius). For other symptoms: Any = any solicited general symptom reported irrespective of intensity and relationship to vaccination. Related = symptoms assessed by the investigator as related to vaccination. Grade 3 drowsiness = prevented normal activity. Grade 3 loss of appetite = not eating at all. Grade 3 irritability= crying that could not be comforted/prevented normal activity. Grade 3 temperature: ≥ 39.0°C.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=293 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=298 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Any Drowsiness
70 Participants
62 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Grade 3 Drowsiness
2 Participants
0 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Related Drowsiness
64 Participants
57 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Any Irritability
90 Participants
87 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Grade 3 Irritability
4 Participants
2 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Related Irritability
83 Participants
78 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Any Loss of appetite
89 Participants
86 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Grade 3 Loss of appetite
4 Participants
3 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Related Loss of appetite
79 Participants
68 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Temperature ≥ 37.5°C
74 Participants
79 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Temperature > 39.0°C
3 Participants
3 Participants
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms.
Related Temperature
63 Participants
62 Participants

SECONDARY outcome

Timeframe: During the 28-day follow-up period (Days 0 to 27) after vaccination

Population: The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects.

An unsolicited AE covers any untoward medical occurrence in a subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any = occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination. Grade 3 = an AE which prevented normal, everyday activities. Related = AE assessed by the investigator as related to vaccination.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=298 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=301 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs).
Subjects with any AE(s)
116 Participants
118 Participants
Number of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs).
Subjects with Grade 3 AE(s)
10 Participants
12 Participants
Number of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs).
Subjects with related AE(s)
7 Participants
9 Participants

SECONDARY outcome

Timeframe: From Day 0 to Day 180 (study conclusion)

Population: The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects.

Serious adverse events (SAEs) assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity. Any was defined as occurrence of any symptom regardless of intensity grade and related was an event assessed by the investigator as causally related to the study vaccination.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=298 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=301 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Subjects With Any and Related Serious Adverse Events (SAEs).
Subjects with any SAE(s)
0 Participants
2 Participants
Number of Subjects With Any and Related Serious Adverse Events (SAEs).
Subjects with related SAE(s)
0 Participants
0 Participants

SECONDARY outcome

Timeframe: From Day 0 to Day 180 (study conclusion)

Population: The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects.

An AESI was defined as an AE including autoimmune diseases and other mediated inflammatory disorders and assessed by the investigator as specific to the treatment administration.

Outcome measures

Outcome measures
Measure
GSK2321138A Group
n=298 Participants
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=301 Participants
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Number of Subjects With Any Adverse Events of Specific Interest (AESIs).
0 Participants
0 Participants

Adverse Events

GSK2321138A Group

Serious events: 0 serious events
Other events: 230 other events
Deaths: 0 deaths

Fluarix Group

Serious events: 2 serious events
Other events: 221 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
GSK2321138A Group
n=298 participants at risk
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=301 participants at risk
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Infections and infestations
Bronchopneumonia
0.00%
0/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
0.33%
1/301 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
Skin and subcutaneous tissue disorders
Urticaria
0.00%
0/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
0.33%
1/301 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.

Other adverse events

Other adverse events
Measure
GSK2321138A Group
n=298 participants at risk
Subjects aged between 18 and 47 months received the GSK2321138A. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the GSK2321138A-Primed Group) received 1 dose of GSK2321138A vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the GSK2321138A-Unprimed Group) received 2 doses of GSK2321138A vaccine at Days 0 and 28. The GSK2321138A vaccine was administered intramuscularly in the deltoid of the right arm.
Fluarix Group
n=301 participants at risk
Subjects aged between 18 and 47 months received the Fluarix™ vaccine. "Primed" subjects (subjects who had received a 2-dose priming immunization with Fluarix™ vaccine in study NCT00764790 - or the Fluarix-Primed Group) received 1 dose of Fluarix™ vaccine at Day 0. "Unprimed" subject (subjects who had not received any 2-dose priming influenza immunization in any previous year - or the the Fluarix-Unprimed Group) received 2 doses of Fluarix™ vaccine at Days 0 and 28. The Fluarix™ vaccine was administered intramuscularly in the deltoid of the right arm.
Infections and infestations
Nasopharyngitis
24.2%
72/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
22.9%
69/301 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
Infections and infestations
Pharyngitis
6.7%
20/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
7.0%
21/301 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
General disorders
Drowsiness
23.9%
70/293 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
20.8%
62/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
General disorders
Irritability
30.7%
90/293 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
29.2%
87/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
General disorders
Loss of appetite
30.4%
89/293 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
28.9%
86/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
General disorders
Temperature
25.3%
74/293 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
26.5%
79/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
General disorders
Pain
42.7%
125/293 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
38.9%
116/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
General disorders
Redness
10.6%
31/293 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
11.4%
34/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
General disorders
Swelling
9.2%
27/293 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.
8.1%
24/298 • SAE(s): during the entire study period (Day 0 - Day 180); Unsolicited AE(s): during the 28-day follow-up period (Days 0 to 27) after any vaccination; Solicited local and general symptoms: during the 7-day (Days 0-6) follow-up period after any vaccination.
For the systematically assessed other (non-serious) adverse events, the number of participants at risk included those from Total Vaccinated cohort who had the symptom sheet completed. No related SAEs were reported.

Additional Information

GSK Response Center

GlaxoSmithKline

Phone: 866-435-7343

Results disclosure agreements

  • Principal investigator is a sponsor employee GSK agreements may vary with individual investigators, but will not prohibit any investigator from publishing. GSK supports the publication of results from all centers of a multi-center trial but requests that reports based on single-site data not precede the primary publication of the entire clinical trial.
  • Publication restrictions are in place

Restriction type: OTHER