Table 2

Results of recruitment into an exercise intervention trial using mass mailing, stratified by age

Age (in yrs)P
50–5960–6970–75Totala
n (%)n (%)n (%)n (%)
 No. of women mailed55,39331,08615,589103,577
 Returned by post office651 (1.2)332 (1.1)134 (0.9)1118 (1.1)
 Total reached by mailing54,74230,75415,455102,459
 Total response to mailingb3,379 (6.2)2,436 (7.9)1,150 (7.4)6,987 (6.8)<0.001
 Responsec
  Deceased16 (0.5)31 (1.3)27 (2.3)74 (1.1)
  Refused2 (0.1)3 (0.1)0 (0.0)5 (0.1)
  Interested<0.001
   Phone call384 (11.3)278 (11.4)170 (14.8)843 (12.0)
   Screening form2,977 (88.1)2,124 (87.2)953 (82.9)6,065 (86.8)
 Number randomized (%)c92 (2.7)56 (2.3)25 (2.2)173 (2.5)0.45
  • a Includes 1,509 potential participants with missing age and excludes 42 women outside of the age range who received mailings.

  • b Denominator for percentages is the total number of women reached by mailing.

  • c Denominator for percentages is the total response to mailing.