Table 3.

Best fitting logistic regression model for smoking and risk of ALS.

Variable	Odds ratio	Lower CI	Upper CI	p Value
Smoking status
Current smoker	3.62	1.02	13.8	0.05
Former smoker	1.08	0.67	1.74	0.74
Comprehensive smoking index	0.81	0.58	1.11	0.2
Age	0.98	0.96	1	0.07
Ever drinker	1.33	0.65	2.75	0.43
Male	1.05	0.68	1.63	0.83
Education level
Primary school	2	0.05	78.4	0.68
Secondary school	1.27	0.05	33.2	0.87
Technical school	0.73	0.03	19.4	0.83
College	1.32	0.05	34.4	0.85
University	0.44	0.02	11.7	0.58
Other	1.6	0.06	45.7	0.75