Table 6

Effect of violation of equality assumption when p = 0.3, p(exp|case) = 0.6, p(exp|control) = 0.3 and OR = 3.5

α₁	α₂	Obs OR	Est α	Corrected OR	% error
0.95	0.95	2.88	0.95	3.50	0
0.90	0.95	2.59	0.94	3.13	−10
0.80	0.95	2.69	0.91	3.96	+13
0.70	0.95	2.40	0.89	4.27	+22
0.95	0.85	2.33	0.89	3.04	−13
0.90	0.85	2.33	0.87	3.37	−4
0.80	0.85	2.13	0.84	3.58	+2
0.70	0.85	1.95	0.81	4.26	+22
0.85	0.85	2.23	0.85	3.50	0