TABLE 6.

Results of four models for multiple logistic regression analyses

All cases and controls (n = 253)
Variable	Matched				Unmatched
	β	Odds ratio	95% CI	P-value	β	Odds ratio	95% CI	P-value
Associated autoimmune diseases	2.481	11.96	3.33, 42.93	0.0001	1.795	6.02	2.65, 13.6	<0.0001
Graviditya	0.253	1.29	1.03, 1.61	0.026	0.199	1.22	1.04, 1.43	0.013
Ever smoked	0.960	2.61	1.27, 5.36	0.009	0.657	1.93	1.11, 3.37	0.021
GU Infection	0.536	1.71	0.78, 3.75	0.182	0.821	2.27	1.23, 4.21	0.009
Cases & controls without other autoimmune diseases or family history of autoimmune disease (n = 170)
Graviditya	0.334	1.40	1.14, 1.71	0.001	0.171	1.19	0.98, 1.43	0.073
Ever smoked	1.540	4.67	2.13, 10.22	0.010	0.870	2.39	1.21, 4.71	0.012
GU Infection	0.750	2.12	1.01, 4.42	0.0001	0.858	2.36	1.17, 4.76	0.017

^aContinuous variable, odds ratio is for each additional pregnancy.