Trial Outcomes & Findings for Effect of Local Steroid Application on a Cervical Plate Versus Intravenous Steroids on Dysphagia Following Anterior Cervical Discectomy and Fusion (ACDF) (NCT NCT02577991)

NCT ID: NCT02577991

Last Updated: 2019-05-30

Results Overview

Outcome measure used to measure the incidence and severity of postoperative trouble swallowing. Summative score of 10 questions (range 0-40) with each question scored 0-4 with higher scores indicating greater severity/frequency of difficulty or disability reported by the patient for the indicated activity; EAT-10 \>3 = dysphagia \& EAT-10 \>15 = severe dysphagia

Recruitment status

COMPLETED

Study phase

NA

Target enrollment

80 participants

Primary outcome timeframe

baseline, post op day 1, post op 2 weeks, post op 6 weeks, post op 3 months, post op 6 months, and post op 1 year.

Results posted on

2019-05-30

Participant Flow

Participant milestones

Participant milestones
Measure
Control Group
No steroid
IV Steroid
10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate Decadron: 10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate
Local Steroid
40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate Triamcinolone: 40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate
Overall Study
STARTED
24
27
29
Overall Study
COMPLETED
21
25
29
Overall Study
NOT COMPLETED
3
2
0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Effect of Local Steroid Application on a Cervical Plate Versus Intravenous Steroids on Dysphagia Following Anterior Cervical Discectomy and Fusion (ACDF)

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Control Group
n=21 Participants
No steroid
IV Steroid
n=25 Participants
10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate Decadron: 10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate
Local Steroid
n=29 Participants
40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate Triamcinolone: 40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate
Total
n=75 Participants
Total of all reporting groups
Age, Categorical
<=18 years
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Age, Categorical
Between 18 and 65 years
15 Participants
n=5 Participants
20 Participants
n=7 Participants
23 Participants
n=5 Participants
58 Participants
n=4 Participants
Age, Categorical
>=65 years
6 Participants
n=5 Participants
5 Participants
n=7 Participants
6 Participants
n=5 Participants
17 Participants
n=4 Participants
Age, Continuous
54 years
n=5 Participants
51.6 years
n=7 Participants
55.6 years
n=5 Participants
53.7 years
n=4 Participants
Sex: Female, Male
Female
10 Participants
n=5 Participants
11 Participants
n=7 Participants
14 Participants
n=5 Participants
35 Participants
n=4 Participants
Sex: Female, Male
Male
11 Participants
n=5 Participants
14 Participants
n=7 Participants
15 Participants
n=5 Participants
40 Participants
n=4 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
21 Participants
n=5 Participants
25 Participants
n=7 Participants
29 Participants
n=5 Participants
75 Participants
n=4 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
Asian
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
Black or African American
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
White
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
Unknown or Not Reported
21 Participants
n=5 Participants
25 Participants
n=7 Participants
29 Participants
n=5 Participants
75 Participants
n=4 Participants
Region of Enrollment
United States
21 participants
n=5 Participants
25 participants
n=7 Participants
29 participants
n=5 Participants
75 participants
n=4 Participants

PRIMARY outcome

Timeframe: baseline, post op day 1, post op 2 weeks, post op 6 weeks, post op 3 months, post op 6 months, and post op 1 year.

Population: All discrepancies between analyzed group participant totals and individual time point participant totals are due lack of patient response for follow-up data for the given time point despite multiple contact attempts by the research team

Outcome measure used to measure the incidence and severity of postoperative trouble swallowing. Summative score of 10 questions (range 0-40) with each question scored 0-4 with higher scores indicating greater severity/frequency of difficulty or disability reported by the patient for the indicated activity; EAT-10 \>3 = dysphagia \& EAT-10 \>15 = severe dysphagia

Outcome measures

Outcome measures
Measure
Control Group
n=21 Participants
No steroid
IV Steroid
n=25 Participants
10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate Decadron: 10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate
Local Steroid
n=29 Participants
40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate Triamcinolone: 40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
Baseline Dysphagia
9.52 percentage
16.00 percentage
10.34 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
Baseline Severe Dysphagia
0 percentage
0 percentage
0 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
1 Day Post Op Dysphagia
76.19 percentage
68.00 percentage
61.90 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
1 Day Post Op Severe Dysphagia
38.09 percentage
32.00 percentage
17.85 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
2 wk. Post Op Dysphagia
50.00 percentage
48.00 percentage
27.58 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
2 wk. Post Op Severe Dysphagia
20.00 percentage
16.00 percentage
0.00 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
6 wk. Post Op Dysphagia
38.09 percentage
34.78 percentage
17.24 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
6 wk. Post Op Severe Dysphagia
28.57 percentage
0.00 percentage
0.00 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
3 mo. Post Op Dysphagia
20.00 percentage
8.69 percentage
6.89 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
3 mo. Post Op Severe Dysphagia
10.00 percentage
0.00 percentage
0.00 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
6 mo. Post Op Dysphagia
21.05 percentage
8.33 percentage
13.79 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
6 mo. Post Op Severe Dysphagia
0.00 percentage
0.00 percentage
0.00 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
1 yr. Post Op Dysphagia
21.05 percentage
0.00 percentage
6.89 percentage
Percentage of Patients Reporting Dysphagia/Severe Dysphagia Through EAT-10 From Baseline Through 1 Year Post-Op
1 yr. Post Op Severe Dysphagia
10.52 percentage
0.00 percentage
0.00 percentage

PRIMARY outcome

Timeframe: baseline, post op day 1, post op 2 weeks, post op 6 weeks, post op 3 months, post op 6 months, and post op 1 year.

Population: All discrepancies between analyzed group participant totals and individual time point participant totals are due lack of patient response for follow-up data for the given time point despite multiple contact attempts by the research team

Outcome measure used to measure the incidence and severity of postoperative trouble with hoarseness of voice; summative score of 10 questions (range 0-40) with each question scored 0-4 with higher scores indicating greater severity/frequency of disability or handicap reported by the patient. Reported as a percentage of patients in each group reporting an 'abnormal' VHI-10 score defined as a summative score \>11

Outcome measures

Outcome measures
Measure
Control Group
n=21 Participants
No steroid
IV Steroid
n=25 Participants
10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate Decadron: 10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate
Local Steroid
n=29 Participants
40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate Triamcinolone: 40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate
Percentage of Patients Reporting Abnormal Vocal Handicap Measured by the VHI-10 From Baseline Through 1 Year Post-Op
3 mo. Post Op Abnormal VHI-10
10.00 percentage of patients
4.34 percentage of patients
0.00 percentage of patients
Percentage of Patients Reporting Abnormal Vocal Handicap Measured by the VHI-10 From Baseline Through 1 Year Post-Op
6 mo. Post Op Abnormal VHI-10
10.53 percentage of patients
8.33 percentage of patients
3.44 percentage of patients
Percentage of Patients Reporting Abnormal Vocal Handicap Measured by the VHI-10 From Baseline Through 1 Year Post-Op
1 yr. Post Op Abnormal VHI-10
10.53 percentage of patients
8.33 percentage of patients
0.00 percentage of patients
Percentage of Patients Reporting Abnormal Vocal Handicap Measured by the VHI-10 From Baseline Through 1 Year Post-Op
Baseline Abnormal VHI-10
9.52 percentage of patients
8.00 percentage of patients
3.44 percentage of patients
Percentage of Patients Reporting Abnormal Vocal Handicap Measured by the VHI-10 From Baseline Through 1 Year Post-Op
1 Day Post Op Abnormal VHI-10
4.76 percentage of patients
4.00 percentage of patients
3.57 percentage of patients
Percentage of Patients Reporting Abnormal Vocal Handicap Measured by the VHI-10 From Baseline Through 1 Year Post-Op
2 wk. Post Op Abnormal VHI-10
10.00 percentage of patients
20.00 percentage of patients
0.00 percentage of patients
Percentage of Patients Reporting Abnormal Vocal Handicap Measured by the VHI-10 From Baseline Through 1 Year Post-Op
6 wk. Post Op Abnormal VHI-10
9.52 percentage of patients
8.69 percentage of patients
3.44 percentage of patients

PRIMARY outcome

Timeframe: Obtained at baseline, post op day 1, post op 2 weeks, post op 6 weeks, post op 3 months, post op 6 months, and post op 1 year

Population: All discrepancies between analyzed group participant totals and individual time point participant totals are due lack of patient response for follow-up data for the given time point despite multiple contact attempts by the research team

Outcome measure used to measure for neck pain that includes personal care, lifting, reading, headaches, concentration, work, driving, sleeping and recreation. Summative scores for 10 questions (range 0-50) with each question scored 0-5 where higher scores for each question indicates greater extent of disability/difficulty for the associated activity. Reported as a mean percentage + standard deviation of difficulty/disability experienced by the patient.

Outcome measures

Outcome measures
Measure
Control Group
n=21 Participants
No steroid
IV Steroid
n=25 Participants
10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate Decadron: 10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate
Local Steroid
n=29 Participants
40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate Triamcinolone: 40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate
Neck Disability Index (NDI) Mean Percentage Score From Baseline Through 1 Year Post Op
Baseline NDI
40 percentage of disability/difficulty
Standard Deviation 19
34 percentage of disability/difficulty
Standard Deviation 18
35 percentage of disability/difficulty
Standard Deviation 19
Neck Disability Index (NDI) Mean Percentage Score From Baseline Through 1 Year Post Op
1 Day Post Op NDI
27 percentage of disability/difficulty
Standard Deviation 14
28 percentage of disability/difficulty
Standard Deviation 16
27 percentage of disability/difficulty
Standard Deviation 18
Neck Disability Index (NDI) Mean Percentage Score From Baseline Through 1 Year Post Op
2 wk. Post Op NDI
31 percentage of disability/difficulty
Standard Deviation 20
24 percentage of disability/difficulty
Standard Deviation 15
20 percentage of disability/difficulty
Standard Deviation 16
Neck Disability Index (NDI) Mean Percentage Score From Baseline Through 1 Year Post Op
6 wk. Post Op NDI
23 percentage of disability/difficulty
Standard Deviation 19
21 percentage of disability/difficulty
Standard Deviation 15
24 percentage of disability/difficulty
Standard Deviation 19
Neck Disability Index (NDI) Mean Percentage Score From Baseline Through 1 Year Post Op
3 mo. Post Op NDI
14.6 percentage of disability/difficulty
Standard Deviation 40
11.1 percentage of disability/difficulty
Standard Deviation 23.3
10 percentage of disability/difficulty
Standard Deviation 23.5
Neck Disability Index (NDI) Mean Percentage Score From Baseline Through 1 Year Post Op
6 mo. Post Op NDI
23 percentage of disability/difficulty
Standard Deviation 19
21 percentage of disability/difficulty
Standard Deviation 15
24 percentage of disability/difficulty
Standard Deviation 19
Neck Disability Index (NDI) Mean Percentage Score From Baseline Through 1 Year Post Op
1 yr. Post Op NDI
22.2 percentage of disability/difficulty
Standard Deviation 33.6
4.0 percentage of disability/difficulty
Standard Deviation 18
6.0 percentage of disability/difficulty
Standard Deviation 26

PRIMARY outcome

Timeframe: Obtained at baseline, post op day 1, post op 2 weeks, post op 6 weeks, post op 3 months, post op 6 months, and post op 1 year; analyzed for all time points through 6 months post op

Population: All discrepancies between analyzed group participant totals and individual time point participant totals are due lack of patient response for follow-up data for the given time point despite multiple contact attempts by the research team

Most commonly utilized pain scale; scored 0-10 with higher values indicating increased severity of pain experienced by the patient

Outcome measures

Outcome measures
Measure
Control Group
n=21 Participants
No steroid
IV Steroid
n=25 Participants
10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate Decadron: 10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate
Local Steroid
n=29 Participants
40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate Triamcinolone: 40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate
Median Visual Analog Scale Pain Score for Patients From Baseline Through 1 Year Post Op
VAS Pain Score (Baseline)
8.0 Score on a scale
Interval 6.0 to 9.0
8.0 Score on a scale
Interval 6.0 to 9.0
7.0 Score on a scale
Interval 4.0 to 9.0
Median Visual Analog Scale Pain Score for Patients From Baseline Through 1 Year Post Op
VAS Pain Score (1 Day Post Op)
7.00 Score on a scale
Interval 6.5 to 9.0
6.00 Score on a scale
Interval 3.0 to 9.0
6.00 Score on a scale
Interval 3.0 to 7.0
Median Visual Analog Scale Pain Score for Patients From Baseline Through 1 Year Post Op
VAS Pain Score (2 wk. Post Op)
6.00 Score on a scale
Interval 5.0 to 8.0
4.00 Score on a scale
Interval 3.0 to 6.0
4.00 Score on a scale
Interval 3.0 to 6.0
Median Visual Analog Scale Pain Score for Patients From Baseline Through 1 Year Post Op
VAS Pain Score (6 wk. Post Op)
5.00 Score on a scale
Interval 3.0 to 8.0
4.00 Score on a scale
Interval 2.0 to 5.5
5.00 Score on a scale
Interval 3.0 to 7.0
Median Visual Analog Scale Pain Score for Patients From Baseline Through 1 Year Post Op
VAS Pain Score (3 mo. Post Op)
4.5 Score on a scale
Interval 1.75 to 7.0
3.0 Score on a scale
Interval 1.0 to 4.0
3.00 Score on a scale
Interval 2.0 to 5.0
Median Visual Analog Scale Pain Score for Patients From Baseline Through 1 Year Post Op
VAS Pain Score (6 mo. Post Op)
5.0 Score on a scale
Interval 3.0 to 8.0
4.0 Score on a scale
Interval 2.0 to 5.5
5.00 Score on a scale
Interval 3.0 to 7.0
Median Visual Analog Scale Pain Score for Patients From Baseline Through 1 Year Post Op
VAS Pain Score (1 yr. Post Op)
4.0 Score on a scale
Interval 1.0 to 6.0
2.0 Score on a scale
Interval 1.0 to 4.0
1.0 Score on a scale
Interval 1.0 to 5.0

PRIMARY outcome

Timeframe: Evaluated at baseline, post op day 1, post op 2 weeks, post op 6 weeks, post op 3 months, post op 6 months, and post op 1 year

Population: All discrepancies between analyzed group participant totals and individual time point participant totals are due lack of patient response for follow-up data for the given time point despite multiple contact attempts by the research team

Outcome measure used to measure the incidence and severity of postoperative trouble swallowing

Outcome measures

Outcome measures
Measure
Control Group
n=21 Participants
No steroid
IV Steroid
n=25 Participants
10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate Decadron: 10 mg of intraoperative intravenous decadron with gel foam sponge placed on cervical plate
Local Steroid
n=29 Participants
40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate Triamcinolone: 40 mg of triamcinolone on gel foam sponge dabbed on the anterior cervical plate
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
Baseline Bazaz Score (Mild or Greater)
4.76 percentage of patients
0.00 percentage of patients
6.89 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
Baseline Bazaz Score (Moderate-Severe)
0.00 percentage of patients
0.00 percentage of patients
0.00 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
1 Day Post Op Bazaz Score (Mild or Greater)
61.90 percentage of patients
44.00 percentage of patients
50.00 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
1 Day Post Op Bazaz Score (Moderate-Severe)
33.33 percentage of patients
24.00 percentage of patients
7.14 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
2 wk. Post Op Bazaz Score (Mild or Greater)
30.00 percentage of patients
16.00 percentage of patients
13.79 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
2 wk. Post Op Bazaz Score (Moderate-Severe)
15.00 percentage of patients
16.00 percentage of patients
0.00 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
6 wk. Post Op Bazaz Score (Mild or Greater)
28.57 percentage of patients
17.39 percentage of patients
6.89 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
6 wk. Post Op Bazaz Score (Moderate-Severe)
23.80 percentage of patients
8.69 percentage of patients
0.00 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
3 mo. Post Op Bazaz Score (Mild or Greater)
15.00 percentage of patients
13.04 percentage of patients
13.79 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
3 mo. Post Op Bazaz Score (Moderate-Severe)
15.00 percentage of patients
0.00 percentage of patients
0.00 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
6 mo. Post Op Bazaz Score (Mild or Greater)
15.78 percentage of patients
8.33 percentage of patients
13.79 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
6 mo. Post Op Bazaz Score (Moderate-Severe)
5.26 percentage of patients
0.00 percentage of patients
0.00 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
1 yr. Post Op Bazaz Score (Mild or Greater)
15.78 percentage of patients
0.00 percentage of patients
3.44 percentage of patients
Percentage of Patients Reporting Mild/Moderate/Severe Dysphagia From Baseline Through 1 Year Post Op Measured With Bazaz Dysphagia Score
1 yr. Post Op Bazaz Score (Moderate-Severe)
5.26 percentage of patients
0.00 percentage of patients
3.44 percentage of patients

Adverse Events

IV Steroid

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

Local Steroid

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

Control Group

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

Serious adverse events

Adverse event data not reported

Other adverse events

Adverse event data not reported

Additional Information

Surabhi Bhatt

Northwestern University Department of Orthopaedic Surgery

Phone: 312-472-6024

Results disclosure agreements

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