Primer postcard improves postal survey response rates

Abstract

Objective: This study measures the effect of an intervention to improve mailed survey response rates. Method: A randomised controlled trial of a 'primer' postcard was performed as part of a large survey in Victoria in 1997. Prior to the survey mailout, half the sample of 800 general practitioners supplied by the Health Insurance Commission was sent, at random, a primer card to request prompt return of the survey. Results: The intervention resulted in a more rapid return of the survey and improved overall response rates from 60% to 66%. The increased cost per returned survey (40c) was largely offset by fewer non-responders requiring follow-up. Conclusions: A primer postcard is a time and cost..