Table 2.

Multinomial Logistic Regression: Independent Effects of Cigarette, Pipe, and Cigar Smoking Habits on “Weekly,” “Monthly,” and “Rarely” Reported Bruxism Compared With Never Bruxism as the Reference Category. Adjusted by Age and Gender

	Model I: cigarette smoking (n = 9,955)			Model II: cigarette, cigar, and pipe smoking (n = 9,762)
	Odds ratio	95% CI	p Value	Odds ratio	95% CI	p Value
Weekly
Sex (female)	1.12	0.91–1.38	.27	1.16	0.94–1.43	.17
Age	0.99	0.98–1.01	.22	0.99	0.98–1.01	.32
Smoking status:
Never smoker	1.00			1.00
Occasional	0.41	0.15–1.13	.09	0.42	0.15–1.14	.087
Former	1.33	0.99–1.77	.06	1.32	0.99–1.77	.060
Current	2.85	2.26–3.61	<.001	2.78	2.18–3.54	<.001
Pipe/cigar	—	—	—	1.65	1.04–2.64	.035
Monthly
Sex (female)	0.87	0.71–1.07	.18	0.86	0.70–1.06	.166
Age	0.97	0.96–0.99	<.001	0.98	0.96–0.99	<.001
Smoking status
Never smoker	1.00			1.00
Occasional	0.92	0.49–1.73	.81	0.76	0.38–1.51	.431
Former	1.64	1.27–2.11	<.001	1.65	1.27–2.13	<.001
Current	1.74	1.37–2.22	<.001	1.76	1.38–2.25	<.001
Pipe/cigar	—	—	—	0.95	0.53–1.70	.856
Rarely
Sex (female)	0.92	0.83–1.02	.12	0.92	0.82–1.02	.120
Age	1.00	0.99–1.00	.19	1.00	0.99–1.00	.242
Smoking status:
Never smoker	1.00			1.00
Occasional	1.24	0.93–1.64	.14	1.23	0.93–1.64	.152
Former	1.47	1.29–1.67	<.001	1.47	1.29–1.68	<.001
Current	1.64	1.44–1.86	<.001	1.64	1.44–1.86	<.001
Pipe/cigar	—	—	—	1.10	0.82–1.48	.525
Never bruxism	1.00	reference category		1.00	reference category