Table 1

Response rates to mailing strategies in a randomized pilot study (first-class mail versus bulk rate and invitation letter) for recruitment into an exercise intervention trial

Response type1st Class/letter1st Class/no letterBulk rate/letterBulk rate/no letter
n (%)an (%)n (%)n (%)
Recruitment packets sent1249124912511250
Returned by post office77 (6.2)84 (6.7)17 (1.4)6 (0.5)
Deceasedb2 (0.2)4 (0.3)0 (0.0)4 (0.3)
Refused3 (0.2)4 (0.3)3 (0.2)0 (0.0)
Interested response101 (8.1)102 (8.2)87 (7.0)86 (6.9)
  • a Denominator for percentages is the total recruitment packets sent in each arm.

  • b Per notification by the family.