Response Rates
Conditions
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
Interventions
OTHERFinancial Incentive
money
Sponsors
Unity Health Toronto
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
SINGLE (Investigator)
Eligibility
Sex/Gender
ALL
Healthy volunteers
No
Inclusion criteria
* Corresponding authors of RCTs included in our previous and updated systematic reviews
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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
| Measure | Time frame | Description |
|---|---|---|
| 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. |
Participant flow
Recruitment details
Authors identified in randomized controlled trials that were eligible for inclusion in two systematic review and network meta-analysis papers.
Pre-assignment details
Authors whose contact information was unidentifiable were excluded.
Participants by arm
| Arm | Count |
|---|---|
| No Incentive Those allocated to the control group will be contacted by email, mail, and phone, but will not receive a financial incentive | 0 |
| 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.
Financial Incentive: money | 0 |
| Total | 0 |
Baseline characteristics
| Characteristic | — |
|---|---|
| Age, Customized Authors who provided complete IPD | — |
| Sex/Gender, Customized Authors who provided complete IPD | — |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk |
|---|---|---|
| deaths Total, all-cause mortality | 0 / 0 | 0 / 0 |
| other Total, other adverse events | 0 / 0 | 0 / 0 |
| serious Total, serious adverse events | 0 / 0 | 0 / 0 |
Outcome results
Primary
Proportion of Authors Who Provided Complete IPD
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.
Time frame: June 2016 - October 2016
Population: None of the authors in either arm shared individual patient data from their study.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| No Incentive (Control) | Proportion of Authors Who Provided Complete IPD | 0 Participants |
| Financial Incentive (Intervention) | Proportion of Authors Who Provided Complete IPD | 0 Participants |
Secondary
The Completeness of the IPD Received
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.
Time frame: June 2016 - October 2016
Population: None of the authors in either arm shared individual patient data from their study therefore no data collected for this Outcome Measure
Secondary
Time Taken to Obtain the IPD Between Initial Request and Authors' Provision
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.
Time frame: June 2016 - October 2016
Population: None of the authors in either arm shared individual patient data from their study therefore no data collected for this Outcome Measure.