Table 1.

Simulated case-control data with true odds ratio = 5

Case	Control	ø	Controls:cases
36	97	0.58	4
6	71
42	168
Ca	Co
41	79	0.94	2
1	5
42	84
Ca	Co
2	1	0.02	2
26	55
28	56
Ca	Co
19	25	0.30	3
9	59
28	84
Ca	Co
20	41	0.37	4
8	71
28	112
Ca	Co
30	21	0.62	1
4	13
34	34
Ca	Co
22	26	0.46	2
6	30
28	56

Odds ratio estimates (Stata v7.0):

Mantel-Haenszel 4.38 (95% CI 2.85 to 6.72)

Conditional MLE 4.36 (95% CI 2.85 to 6.67)

Unconditional MLE 4.42 (95% CI 2.88 to 6.78)