Trial Outcomes & Findings for Study of SPM 962 in Patients With Restless Legs Syndrome (RLS) (NCT NCT01084551)

NCT ID: NCT01084551

Last Updated: 2014-06-05

Results Overview

Change from the baseline to the end of dose-titration/dose-maintenance period. IRLS is a scale for assessing severity of restless legs syndrome symptoms. IRLS consists of ten questions. Each question is scored from 4 for the first (top) answer (usually 'very severe') to 0 for the last answer (usually none). The sum of the score of each question serves as the scale score. The scale scoring criteria are: Mild (score 1-10); Moderate (score 11-20); Severe (score 21-30); Very severe (score 31-40). A decrease in the scores means improvement.

Recruitment status

COMPLETED

Study phase

PHASE3

Target enrollment

284 participants

Primary outcome timeframe

Baseline, the end of dose-titration/dose-maintenance period (week 13)

Results posted on

2014-06-05

Participant Flow

Participant milestones

Participant milestones
Measure
Placebo
0 mg/day for 13 weeks
SPM 962 4.5
started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Overall Study
STARTED
95
95
94
Overall Study
COMPLETED
86
81
86
Overall Study
NOT COMPLETED
9
14
8

Reasons for withdrawal

Reasons for withdrawal
Measure
Placebo
0 mg/day for 13 weeks
SPM 962 4.5
started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Overall Study
Adverse Event
2
9
4
Overall Study
Lack of Efficacy
2
0
1
Overall Study
Withdrawal by Subject
2
1
0
Overall Study
Protocol Violation
2
4
0
Overall Study
Lost to Follow-up
0
0
3
Overall Study
Physician Decision
1
0
0

Baseline Characteristics

Study of SPM 962 in Patients With Restless Legs Syndrome (RLS)

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Placebo
n=95 Participants
0 mg/day for 13 weeks
SPM 962 4.5
n=95 Participants
started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=94 Participants
started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Total
n=284 Participants
Total of all reporting groups
Age, Continuous
53.4 years
STANDARD_DEVIATION 15.3 • n=93 Participants
50.7 years
STANDARD_DEVIATION 13.3 • n=4 Participants
50.9 years
STANDARD_DEVIATION 13.7 • n=27 Participants
51.7 years
STANDARD_DEVIATION 14.1 • n=483 Participants
Age, Categorical
<=18 years
0 Participants
n=93 Participants
0 Participants
n=4 Participants
0 Participants
n=27 Participants
0 Participants
n=483 Participants
Age, Categorical
Between 18 and 65 years
65 Participants
n=93 Participants
77 Participants
n=4 Participants
77 Participants
n=27 Participants
219 Participants
n=483 Participants
Age, Categorical
>=65 years
30 Participants
n=93 Participants
18 Participants
n=4 Participants
17 Participants
n=27 Participants
65 Participants
n=483 Participants
Sex: Female, Male
Female
54 Participants
n=93 Participants
54 Participants
n=4 Participants
46 Participants
n=27 Participants
154 Participants
n=483 Participants
Sex: Female, Male
Male
41 Participants
n=93 Participants
41 Participants
n=4 Participants
48 Participants
n=27 Participants
130 Participants
n=483 Participants
Region of Enrollment
Japan
95 participants
n=93 Participants
95 participants
n=4 Participants
94 participants
n=27 Participants
284 participants
n=483 Participants

PRIMARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (week 13)

Population: Full analysis set (FAS), last observation carried forward (LOCF)

Change from the baseline to the end of dose-titration/dose-maintenance period. IRLS is a scale for assessing severity of restless legs syndrome symptoms. IRLS consists of ten questions. Each question is scored from 4 for the first (top) answer (usually 'very severe') to 0 for the last answer (usually none). The sum of the score of each question serves as the scale score. The scale scoring criteria are: Mild (score 1-10); Moderate (score 11-20); Severe (score 21-30); Very severe (score 31-40). A decrease in the scores means improvement.

Outcome measures

Outcome measures
Measure
Placebo
n=95 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=94 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
International Restless Legs Syndrome Rating Scale (IRLS) Total Score
-11.6 Scores on a scale
Standard Deviation 8.2
-14.3 Scores on a scale
Standard Deviation 8.9
-14.6 Scores on a scale
Standard Deviation 9.0

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (week 13)

Population: FAS, LOCF

CGI improvement is a clinician-reported scale for assessing how much the patient's illness has improved or worsened from baseline. The scale scoring criteria are 1: very much improved, 2: much improved, 3: minimally improved, 4: no change, 5: minimally worse, 6: much worse, 7: very much worse.

Outcome measures

Outcome measures
Measure
Placebo
n=95 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Clinical Global Impression (CGI) Improvement
Subjects with "much improved"
24.2 Percentage of Participants
25.8 Percentage of Participants
29.0 Percentage of Participants
Clinical Global Impression (CGI) Improvement
Subjects with "very much improved"
33.7 Percentage of Participants
41.9 Percentage of Participants
45.2 Percentage of Participants

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (week 13)

Population: FAS, LOCF

PGI improvement is a patient-reported scale for assessing how much the patient's illness has improved or worsened from baseline. The scale scoring criteria are 1: very much better, 2: much better, 3: a little better, 4: no change, 5: a little worse, 6: much worse, 7: very much worse.

Outcome measures

Outcome measures
Measure
Placebo
n=95 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Patient Global Impression (PGI) Improvement
Subjects with "much improved"
23.2 Percentage of Participants
24.7 Percentage of Participants
30.1 Percentage of Participants
Patient Global Impression (PGI) Improvement
Subjects with "very much improved"
38.9 Percentage of Participants
48.4 Percentage of Participants
50.5 Percentage of Participants

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (week 13)

Population: FAS, LOCF

Change of PSQI from baseline to the end of dose-titration/dose-maintenance period. PSQI is a scale for assessing severity of sleep disorders. The score ranges from 0 to 21. 0 indicates "no difficulty" and 21 indicates "severe difficulty". A decrease in the scores means improvement.

Outcome measures

Outcome measures
Measure
Placebo
n=94 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=90 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
The Pittsburgh Sleep Quality Index (PSQI)
-2.5 Scores on a scale
Standard Deviation 2.4
-3.1 Scores on a scale
Standard Deviation 3.2
-3.2 Scores on a scale
Standard Deviation 3.3

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (week 13)

Population: FAS, LOCF

IRLS is a scale for assessing severity of restless legs syndrome symptoms. IRLS consists of ten questions. Each question is scored from 4 for the first (top) answer (usually 'very severe') to 0 for the last answer (usually none). Numbers of subjects with -4 or -3 score change from baseline in each item of IRLS. A decrease in the scores means improvement.

Outcome measures

Outcome measures
Measure
Placebo
n=95 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=94 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Each Item of IRLS (10 Items)
-3 (RLS symptoms frequency)
12.6 percentage of participants
9.7 percentage of participants
11.7 percentage of participants
Each Item of IRLS (10 Items)
-4 (RLS discomfort)
1.1 percentage of participants
2.2 percentage of participants
6.4 percentage of participants
Each Item of IRLS (10 Items)
-3 (RLS discomfort)
11.6 percentage of participants
17.2 percentage of participants
12.8 percentage of participants
Each Item of IRLS (10 Items)
-4 (need to move around due to RLS symptoms)
2.1 percentage of participants
2.2 percentage of participants
7.4 percentage of participants
Each Item of IRLS (10 Items)
-3 (need to move around due to RLS symptoms)
11.6 percentage of participants
25.8 percentage of participants
18.1 percentage of participants
Each Item of IRLS (10 Items)
-4 (discomfort relief by moving around)
0 percentage of participants
1.1 percentage of participants
2.1 percentage of participants
Each Item of IRLS (10 Items)
-3 (discomfort relief by moving around)
10.5 percentage of participants
20.4 percentage of participants
28.7 percentage of participants
Each Item of IRLS (10 Items)
-4 (severity of RLS as a whole)
1.1 percentage of participants
1.1 percentage of participants
4.3 percentage of participants
Each Item of IRLS (10 Items)
-3 (severity of RLS as a whole)
6.3 percentage of participants
12.9 percentage of participants
12.8 percentage of participants
Each Item of IRLS (10 Items)
-4 (RLS symptoms frequency)
12.6 percentage of participants
24.7 percentage of participants
26.6 percentage of participants
Each Item of IRLS (10 Items)
-4 (average duration of RLS symptoms)
1.1 percentage of participants
2.2 percentage of participants
2.1 percentage of participants
Each Item of IRLS (10 Items)
-3 (average duration of RLS symptoms)
6.3 percentage of participants
10.8 percentage of participants
9.6 percentage of participants
Each Item of IRLS (10 Items)
-4 (severity of sleep disturbance)
2.1 percentage of participants
4.3 percentage of participants
6.4 percentage of participants
Each Item of IRLS (10 Items)
-3 (severity of sleep disturbance)
16.8 percentage of participants
16.1 percentage of participants
21.3 percentage of participants
Each Item of IRLS (10 Items)
-4 (tiredness or sleepiness during the day)
0 percentage of participants
2.2 percentage of participants
2.1 percentage of participants
Each Item of IRLS (10 Items)
-3 (tiredness or sleepiness during the day)
8.4 percentage of participants
11.8 percentage of participants
8.5 percentage of participants
Each Item of IRLS (10 Items)
-4 (severity of the impact on daily affairs)
0 percentage of participants
1.1 percentage of participants
1.1 percentage of participants
Each Item of IRLS (10 Items)
-3 (severity of the impact on daily affairs)
8.4 percentage of participants
11.8 percentage of participants
4.3 percentage of participants
Each Item of IRLS (10 Items)
-4 (severity of mood disturbance)
1.1 percentage of participants
4.3 percentage of participants
1.1 percentage of participants
Each Item of IRLS (10 Items)
-3 (severity of mood disturbance)
8.4 percentage of participants
10.8 percentage of participants
12.8 percentage of participants

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (week 13)

Population: FAS, LOCF

Incidence rate of RLS symptoms is calculated as the number of days with RLS symptoms in the week / the number of evaluation days in the week\* 100%

Outcome measures

Outcome measures
Measure
Placebo
n=95 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=92 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Incidence of RLS Symptoms
Baseline
85.7 percentage of days with RLS symptom
Standard Deviation 20.8
85.4 percentage of days with RLS symptom
Standard Deviation 20.5
83.2 percentage of days with RLS symptom
Standard Deviation 22.2
Incidence of RLS Symptoms
Week 13
48.7 percentage of days with RLS symptom
Standard Deviation 40.9
35.8 percentage of days with RLS symptom
Standard Deviation 38.6
36.8 percentage of days with RLS symptom
Standard Deviation 38.8

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (weeks 13)

Population: FAS, LOCF

Change of average duration of RLS symptoms in a week from baseline to the end of dose-titration/dose-maintenance period. Only the days with RLS symptoms are used for calculation.

Outcome measures

Outcome measures
Measure
Placebo
n=71 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=59 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=55 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Average Duration of RLS Symptoms
-3.1 Hours
Standard Deviation 4.7
-3.7 Hours
Standard Deviation 4.6
-4.3 Hours
Standard Deviation 4.4

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (week 13)

Population: FAS, LOCF

Incidence rate of RLS symptoms is calculated as the number of days with RLS symptoms / the number of days of evaluation \* 100%.

Outcome measures

Outcome measures
Measure
Placebo
n=95 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=92 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Incidence of RLS Symptoms in the Evening and Night
Baseline
80.6 percentage of days/week with symptoms
Standard Deviation 24.2
83.3 percentage of days/week with symptoms
Standard Deviation 20.8
79.5 percentage of days/week with symptoms
Standard Deviation 24.2
Incidence of RLS Symptoms in the Evening and Night
Week 13
45.4 percentage of days/week with symptoms
Standard Deviation 41.0
34.6 percentage of days/week with symptoms
Standard Deviation 38.2
31.8 percentage of days/week with symptoms
Standard Deviation 37.7

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (weeks 13)

Population: FAS, LOCF

Change of average duration of RLS symptoms in a week from baseline to the end of dose-titration/dose-maintenance period. Only the days with RLS symptoms are used for calculation.

Outcome measures

Outcome measures
Measure
Placebo
n=69 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=58 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=50 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Average Duration of RLS Symptoms in the Evening and Night in a Week
-1.3 Hours
Standard Deviation 3.1
-1.8 Hours
Standard Deviation 2.5
-1.5 Hours
Standard Deviation 2.3

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (week 13)

Population: FAS, LOCF

Nocturnal awakening rate is calculated as the number of days with nocturnal awakenings / the number of days of evaluation \* 100%.

Outcome measures

Outcome measures
Measure
Placebo
n=95 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=92 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Nocturnal Awakenings Due to RLS Symptoms in a Week
Baseline
33.5 percentage of days/week with awakening
Standard Deviation 35.9
22.6 percentage of days/week with awakening
Standard Deviation 31.3
28.3 percentage of days/week with awakening
Standard Deviation 34.3
Nocturnal Awakenings Due to RLS Symptoms in a Week
Week 13
15.6 percentage of days/week with awakening
Standard Deviation 31.7
7.7 percentage of days/week with awakening
Standard Deviation 20.5
7.5 percentage of days/week with awakening
Standard Deviation 19.5

SECONDARY outcome

Timeframe: Baseline, the end of dose-titration/dose-maintenance period (weeks 13)

Population: FAS, LOCF

Change of average sleep time in a week from baseline to the end of dose-titration/dose-maintenance period.

Outcome measures

Outcome measures
Measure
Placebo
n=95 Participants
Once a daily transdermal administration for 13 weeks
SPM 962 4.5
n=93 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=92 Participants
Once a daily transdermal administration of SPM 962 started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Average Sleep Time in a Week
0.4 Hours
Standard Deviation 0.8
0.5 Hours
Standard Deviation 1.1
0.4 Hours
Standard Deviation 1.1

Adverse Events

Placebo

Serious events: 2 serious events
Other events: 32 other events
Deaths: 0 deaths

SPM 962 4.5

Serious events: 0 serious events
Other events: 72 other events
Deaths: 0 deaths

SPM 962 6.75

Serious events: 1 serious events
Other events: 77 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Placebo
n=95 participants at risk
0 mg/day for 13 weeks
SPM 962 4.5
n=95 participants at risk
started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=94 participants at risk
started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Injury, poisoning and procedural complications
Contusion
0.00%
0/95 • 14 weeks
0.00%
0/95 • 14 weeks
1.1%
1/94 • Number of events 1 • 14 weeks
Injury, poisoning and procedural complications
Traffic Accident
0.00%
0/95 • 14 weeks
0.00%
0/95 • 14 weeks
1.1%
1/94 • Number of events 1 • 14 weeks
Nervous system disorders
Lacunar Infarction
1.1%
1/95 • Number of events 1 • 14 weeks
0.00%
0/95 • 14 weeks
0.00%
0/94 • 14 weeks
Nervous system disorders
VIIth Nerve Paralysis
1.1%
1/95 • Number of events 1 • 14 weeks
0.00%
0/95 • 14 weeks
0.00%
0/94 • 14 weeks

Other adverse events

Other adverse events
Measure
Placebo
n=95 participants at risk
0 mg/day for 13 weeks
SPM 962 4.5
n=95 participants at risk
started at 2.25 mg/day to 4.5 mg/day for 13 weeks
SPM 962 6.75
n=94 participants at risk
started at 2.25 mg/day to 6.75 mg/day for 13 weeks
Cardiac disorders
Ventricular Extrasystoles
0.00%
0/95 • 14 weeks
0.00%
0/95 • 14 weeks
3.2%
3/94 • Number of events 3 • 14 weeks
Gastrointestinal disorders
Nausea
9.5%
9/95 • Number of events 12 • 14 weeks
33.7%
32/95 • Number of events 37 • 14 weeks
43.6%
41/94 • Number of events 48 • 14 weeks
Gastrointestinal disorders
Vomiting
1.1%
1/95 • Number of events 2 • 14 weeks
4.2%
4/95 • Number of events 5 • 14 weeks
10.6%
10/94 • Number of events 11 • 14 weeks
Gastrointestinal disorders
Abdominal Discomfort
3.2%
3/95 • Number of events 3 • 14 weeks
0.00%
0/95 • 14 weeks
10.6%
10/94 • Number of events 11 • 14 weeks
Gastrointestinal disorders
Abdominal Pain
0.00%
0/95 • 14 weeks
3.2%
3/95 • Number of events 3 • 14 weeks
1.1%
1/94 • Number of events 1 • 14 weeks
Gastrointestinal disorders
Constipation
0.00%
0/95 • 14 weeks
3.2%
3/95 • Number of events 3 • 14 weeks
3.2%
3/94 • Number of events 3 • 14 weeks
Gastrointestinal disorders
Diarrhoea
3.2%
3/95 • Number of events 3 • 14 weeks
0.00%
0/95 • 14 weeks
1.1%
1/94 • Number of events 1 • 14 weeks
General disorders
Application Site Reaction
7.4%
7/95 • Number of events 8 • 14 weeks
42.1%
40/95 • Number of events 41 • 14 weeks
50.0%
47/94 • Number of events 50 • 14 weeks
General disorders
Malaise
1.1%
1/95 • Number of events 2 • 14 weeks
2.1%
2/95 • Number of events 2 • 14 weeks
3.2%
3/94 • Number of events 3 • 14 weeks
Infections and infestations
Nasopharyngitis
12.6%
12/95 • Number of events 17 • 14 weeks
12.6%
12/95 • Number of events 14 • 14 weeks
17.0%
16/94 • Number of events 17 • 14 weeks
Nervous system disorders
Headache
0.00%
0/95 • 14 weeks
5.3%
5/95 • Number of events 6 • 14 weeks
2.1%
2/94 • Number of events 2 • 14 weeks
Nervous system disorders
Dizziness
3.2%
3/95 • Number of events 3 • 14 weeks
2.1%
2/95 • Number of events 2 • 14 weeks
1.1%
1/94 • Number of events 1 • 14 weeks
Psychiatric disorders
Somnolence
2.1%
2/95 • Number of events 2 • 14 weeks
10.5%
10/95 • Number of events 10 • 14 weeks
14.9%
14/94 • Number of events 14 • 14 weeks
Respiratory, thoracic and mediastinal disorders
Upper Respiratory Tract Inflammation
1.1%
1/95 • Number of events 1 • 14 weeks
3.2%
3/95 • Number of events 4 • 14 weeks
4.3%
4/94 • Number of events 4 • 14 weeks

Additional Information

Director of Clinical Research and Development

Otsuka Pharmaceutical Co., Ltd.

Phone: +81-3-6361-7366

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place