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Table 2 Response rates throughout the four measurement waves (T1-T4) of the TRAILS study for participants who were easy and hard-to-recruit at the first wave

From: Benefits of extensive recruitment effort persist during follow-ups and are consistent across age group and survey method. The TRAILS study

  T1 T2 T3 T4
  n n % n % n %
T1-easy-to-recruit 2,085 2,015 96.6 1,730 83.0 1,792 85.9
T1-hard-to-recruit 145 134 92.4 86 59.3 89 61.4
   OR 95% CI OR 95% CI OR 95% CI
T1-hard-to-recruita   0.42* 0.22 – 0.82 0.30* 0.21 – 0.43 0.26* 0.18 – 0.37
  1. *p < .05; Odds ratios (OR) and 95% confidence intervals (CI) from single binary logistic regression analyses predicting response.
  2. a T1-easy-to-recruit is the reference category; recruitment status is the independent variable.
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