Table 2.

Estimation of sample size based on 95% CIs

	P0
	0.50	0.55	0.60	0.65	0.70
E 0.05	392	388	377	357	330
0.10	98	97	94	89	82
0.11	81	80	78	74	68
0.12	68	67	65	62	57
0.13	58	57	56	53	49
0.14	50	50	48	46	42
0.15	44	43	42	40	37

P₀, prior estimate of the proportion of studies with adequate reporting according to the CONSORT statement extension for randomised pilot and feasibility trials checklist.

E, margin of error.