Trial Outcomes & Findings for Contacting Authors to Retrieve Individual Patient Data (NCT NCT02569411)
NCT ID: NCT02569411
Last Updated: 2020-07-01
Results Overview
We contacted authors of eligible studies from June 2016 to October 2016. Authors were first contacted in June 2016, where we sent: a) an email requesting their IPD, b) email reminders (4 in total) at 2, 6, 10, and 14-week intervals after the initial email, c) reminders by post in week 7, and d) reminders via telephone in week 15.
COMPLETED
NA
129 participants
June 2016 - October 2016
2020-07-01
Participant Flow
Authors identified in randomized controlled trials that were eligible for inclusion in two systematic review and network meta-analysis papers.
Authors whose contact information was unidentifiable were excluded.
Participant milestones
| Measure |
No Incentive (Control)
Those allocated to the control group will be contacted using the same approaches as the intervention arm for their participation to share individual patient data of their study. No financial incentive is provided.
|
Financial Incentive (Intervention)
Those allocated to the intervention group will be contacted by email, mail, and phone to share individual patient data from their study. They will be given a financial incentive (an offer of a $100 CAD gift card at first contact (or equivalent amount in the author's relevant currency) for their participation to share individual patient data of their study).
|
|---|---|---|
|
Overall Study
STARTED
|
65
|
64
|
|
Overall Study
COMPLETED
|
0
|
0
|
|
Overall Study
NOT COMPLETED
|
65
|
64
|
Reasons for withdrawal
Withdrawal data not reported
Baseline Characteristics
Contacting Authors to Retrieve Individual Patient Data
Baseline characteristics by cohort
Baseline data not reported
PRIMARY outcome
Timeframe: June 2016 - October 2016Population: None of the authors in either arm shared individual patient data from their study.
We contacted authors of eligible studies from June 2016 to October 2016. Authors were first contacted in June 2016, where we sent: a) an email requesting their IPD, b) email reminders (4 in total) at 2, 6, 10, and 14-week intervals after the initial email, c) reminders by post in week 7, and d) reminders via telephone in week 15.
Outcome measures
| Measure |
No Incentive (Control)
n=65 Participants
Those allocated to the control group will be contacted using the same approaches as the intervention arm for their participation to share individual patient data of their study. No financial incentive is provided.
|
Financial Incentive (Intervention)
n=64 Participants
Those allocated to the intervention group will be contacted by email, mail, and phone to share individual patient data from their study. They will be given a financial incentive (an offer of a $100 CAD gift card at first contact (or equivalent amount in the author's relevant currency) for their participation to share individual patient data of their study).
|
|---|---|---|
|
Proportion of Authors Who Provided Complete IPD
|
0 Participants
|
0 Participants
|
SECONDARY outcome
Timeframe: June 2016 - October 2016Population: None of the authors in either arm shared individual patient data from their study therefore no data collected for this Outcome Measure.
We contacted authors of eligible studies from June 2016 to October 2016. Authors were first contacted in June 2016, where we sent: a) an email requesting their IPD, b) email reminders (4 in total) at 2, 6, 10, and 14-week intervals after the initial email, c) reminders by post in week 7, and d) reminders via telephone in week 15.
Outcome measures
Outcome data not reported
SECONDARY outcome
Timeframe: June 2016 - October 2016Population: None of the authors in either arm shared individual patient data from their study therefore no data collected for this Outcome Measure
We contacted authors of eligible studies from June 2016 to October 2016. Authors were first contacted in June 2016, where we sent: a) an email requesting their IPD, b) email reminders (4 in total) at 2, 6, 10, and 14-week intervals after the initial email, c) reminders by post in week 7, and d) reminders via telephone in week 15.
Outcome measures
Outcome data not reported
Adverse Events
No Incentive (Control)
Financial Incentive (Intervention)
Serious adverse events
Adverse event data not reported
Other adverse events
Adverse event data not reported
Additional Information
Results disclosure agreements
- Principal investigator is a sponsor employee
- Publication restrictions are in place