Table 4.

Multinomial Logistic Regression: Effect of Lifetime DSM-IV Nicotine Dependence (yes/no, with no as the reference category) on “weekly,” “Monthly,” and “Rarely” Reported Bruxism Among Ever-Smokers Evaluated for Nicotine Dependence in the Nicotine Addiction Genetics sample. Adjusted by Age and Gender (Model I) and for Age, Gender, DSM-IV Diagnoses of Major Depression and Alcohol Dependence (Model II)

n = 445 ever smokers	Odds ratio	95 % CI	p Value
Weekly
Model I	2.50	1.06–5.87	.036
Model II	2.10	0.86–5.08	.102
Monthly
Model I	1.15	0.52–2.55	.726
Model II	0.93	0.43–2.22	.957
Rarely
Model I	1.51	0.95–2.39	.080
Model II	1.62	1.00–2.62	.050
Never	1.00	reference category