Contacting Authors to Retrieve Individual Patient Data

Not Applicable

Completed

• Conditions: Response Rates
• Interventions: Other: Financial Incentive

• Registration Number: NCT02569411
• Lead Sponsor: Unity Health Toronto

Brief Summary

The objective of this study is to examine the impact of incentivizing authors of RCTs that are eligible for a systematic review and meta-analysis, versus usual contact strategies to obtain original IPD

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2015-09-30
• Study First Submitted QC: 2015-10-02
• Study First Posted: 2015-10-06
• Study Start: 2016-06-10
• Primary Completion: 2018-02-28
• Study Completion: 2018-02-28
• Results First Submitted: 2020-05-06
• Status Verified: 2020-06
• Results First Submitted QC: 2020-06-16
• Last Update Submitted: 2020-06-16
• Results First Posted: 2020-07-01
• Last Update Posted: 2020-07-01

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 129

Inclusion Criteria

• Corresponding authors of RCTs included in our previous and updated systematic reviews

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Exclusion Criteria

Not provided

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Incentive	Financial Incentive	Those allocated to the intervention group will be contacted by email, mail, and phone, and will be asked to provide the IPD from their RCT and they will be given a financial incentive.

Primary Outcome Measures

Name	Time	Method
Proportion of Authors Who Provided Complete IPD	June 2016 - October 2016	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.

Secondary Outcome Measures

Name	Time	Method
Time Taken to Obtain the IPD Between Initial Request and Authors' Provision	June 2016 - October 2016	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.
The Completeness of the IPD Received	June 2016 - October 2016	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.