Hj. Sutherland et al., A RANDOMIZED TRIAL OF THE TOTAL DESIGN METHOD FOR THE POSTAL FOLLOW-UP OF WOMEN IN A CANCER PREVENTION TRIAL, European journal of cancer prevention, 5(3), 1996, pp. 165-168
Mail surveys have been used to follow-up early participants in a Canad
ian breast cancer prevention trial, To minimize non-response bias, we
undertook a randomized study of two postal strategies, of which one wa
s our usual procedure and the other was a systematic application, know
n as the total design method (TDM) and described by Dillman. The respo
nse rates to the two methods were 62 and 88% respectively. The TDM is
a practical, cost-efficient approach to reducing non-response bias in
postal surveys and as such has an important role in epidemiological re
search which involves healthy participants.