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Table 3 General recruitment results for all methods and all studies participating in the CRI *

From: You are how you recruit: a cohort and randomized controlled trial of recruitment strategies

  Recruited Not recruited p-value
  n=1003 n=2248 Univariate Multivariate**
Mean age (95% CI) 30.88 29.98 <0.001 0.003
  (30.56 - 31.19) (29.61 - 30.35)
n=841 n=673
Mean income quintile (95% CI) 3.20 3.11 0.41 0.11
  (3.11 - 3.30) ( 3.04 - 3.17)
n=793 n=1910
Proportion from the general Canadian population 83.1% 80.3% 0.40 0.40
(152/183) (451/562)
Proportion with gestational age >= 24 weeks 44.7% 61.7% <0.001 0.03
(441/986) (1807/2927)
Mean number of calls 4 4 0.01 0.04
Median between quartiles 1 and 3 (2.0 – 6.0) (2.0 – 8.0)
  n=286 n=745
  1. *Results exclude those 960 individuals not eligible for recruitment based on the assigned study inclusion or exclusion criteria.
  2. **Controlling for differences between recruiting study.