Table 4.

Within-practice participant recruitment timeframe by participant recruitment/randomisation factors

	Randomisation method
	Practice (cluster)	Individual
Days from date of recruitment of first participant to recruitment of final participant by randomisation method (mean (sd), n)	58.1 (55.3), 18	58.0 (78.2), 5
Between-group mean difference (95% CI)	0.1 (-63.3; 63.5)
	Recruitment method
	Opportunistic	Systematic
Days from date of recruitment of first participant to recruitment of final participant by recruitment method (mean (sd), n)	31.8 (34.2), 12	86.7 (68.0), 11
Between-group mean difference (95% CI)a	-54.9 (-103.6; -6.2)

^a95% CI derived from t-test with unequal variances. CI, confidence interval; sd, standard deviation.