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Table 3 Response rates to pilot surveys 1 and 2

From: Methods to increase response rates to a population-based maternity survey: a comparison of two pilot studies

  Pilot 1 (N = 1000) Pilot 2 (N = 2000) % difference 95% CI for % difference p-value
n^ % n^ %    
After initial mail out
(Before reminder 1 mail out)
169 16.9 371 18.6 +1.7 -1.25, 4.52 0.25
After reminder 1 mail out
(Before reminder 2 mail out)
276 27.6 564 28.2 +0.6 -2.84, 3.95 0.73
End of survey
(After reminder 2 mail out in pilot 2 only)
287 28.7 662 33.1 +4.4 0.88, 7.83 0.02*
Postal (end of survey) 268 26.8 593 29.7 +2.9 −0.54, 6.25 0.10
Online (end of survey) 18 1.8 69 3.5 +1.7 0.45, 2.81 0.01*
Telephone (end of survey) 1 0.1 0 0 −0.1 −0.11, 0.56 0.16
  1. *Chi-square significant at p < 0.05
  2. ^ Number of responses