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

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

	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
Proportion from the general Canadian population	(152/183)	(451/562)	0.40	0.40
Proportion with gestational age >= 24 weeks	44.7%	61.7%	<0.001	0.03
Proportion with gestational age >= 24 weeks	(441/986)	(1807/2927)	<0.001	0.03
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

*Results exclude those 960 individuals not eligible for recruitment based on the assigned study inclusion or exclusion criteria.
**Controlling for differences between recruiting study.

ISSN: 1471-2288