Does the time at which a participant incentive is given affect the retention rate?
SWAT: 90
Objective of this SWAT:
To compare the effects on retention rates of giving trial participants a £20 gift voucher at the recruitment visit versus when they have returned their trial diary
Status:
In Progress
Resources:
Please click the links below to access the registered protocol or SWAT download bundle which includes: 1) SWHSI Initial Results Publication
