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Unconditional or conditional incentives for initial and followup postal questionnaires in a clinical trial

SWAT: 96

Objective of this SWAT:

To evaluate the effect of unconditional versus conditional gift voucher incentives on response rates to initial and repeat mailed questionnaires, reminders sent and questionnaire completeness


In Progress


Please click the links below to access the registered protocol or SWAT download bundle which includes: 1) SWAT Intial Results Publication; 2)SWAT Replication publication
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