Table 3.

Detailed comparison of the result values for each risk factor between the two groups.

		95% confidence interval
	Odds ratio value	Lower	Upper	P value
Smoking	2.275	1.348	3.841	.002
Family history of MS	3.970	1.807	8.719	<.001
Migraine	3.011	1.345	6.741	.005
Vitamin D deficiency	4.778	2.863	7.972	<.001
Diabetes	.652	.226	1.882	0.426
High-blood pressure	1.445	.724	2.885	.296
Appendectomy	1.269	.486	3.317	.626
Tonsillectomy	1.280	.576	2.843	.544
First-born child	0.933	.558	1.562	.793