Table 3

Minimum detectable OR with a cleft subtype case sample and non-cleft control sample, 80% power and probability of a type 1 error at 5%

		Case-to-control^* ratio
		1:1	1:2	1:3	1:4
		Cleft lip only (n=1157)
Proportion of control sample^* exposed	0.1	1.44	1.39	1.37	1.33
	0.2	1.32	1.29	1.27	1.25
	0.3	1.28	1.26	1.24	1.22
	0.4	1.27	1.24	1.23	1.21
		Cleft palate only (n=2112)
	0.1	1.31	1.28	1.27	1.24
	0.2	1.23	1.21	1.20	1.18
	0.3	1.20	1.18	1.17	1.16
	0.4	1.19	1.17	1.16	1.15
		Unilateral cleft lip and palate (n=1042)
	0.1	1.46	1.42	1.39	1.35
	0.2	1.34	1.31	1.29	1.26
	0.3	1.30	1.27	1.25	1.23
	0.4	1.28	1.25	1.24	1.22
		Bilateral cleft lip and palate (n=511)
	0.1	1.70	1.62	1.58	1.52
	0.2	1.51	1.46	1.43	1.39
	0.3	1.45	1.40	1.38	1.34
	0.4	1.42	1.38	1.36	1.32