Barriers and facilitators to patient recruitment to a cluster randomized controlled trial in primary care: lessons for future trials

Table 2 Patient recruitment rate by GPs

No. of patients enrolled	No of GPs (%)	% Female	No. of asthma patients seen per week on average by GP^*	No. months between GP enrolment and first patient enrolled^†	GP recollection of number of patients invited to participate^*	Proportion of invited patients who were enrolled^‡
0	15 (27)	67	12.40 ± 10.78	-----	5.0 ± 5.9	-----
1-4	21 (38)	33	6.65 ± 7.02	4.8 ± 4.7	19.7 ± 25.7	29% ± 34%
5 or more	19 (35)	47	10.9 ± 7.2	0.9 ± 1.2	12.4 ± 6.7	60% ± 30%

Total number of patients enrolled = 143. Mean number of patients enrolled per GP 2.6 ± SD2.5; ^*Anova, p > 0.149; ^†Independent samples T-test, p = 0.001; ^‡Anova, p = 0.008. Proportion of invited patients enrolled = No. of patients enrolled/GP recollection of no. patients invited to participate.

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