Table 4.

Multivariate Model: Class Membership and Demographics/Other Substances (n = 2,624)

	Class 1: no/ limited use	Class 2: snuff/snus	Class 3: cigarillos and hookah	Class 4: cigarette smokers	Class 5: poly-users
		OR (95% CI)
Demographics
Sex (% male)	Reference	7.8 (5.4–12)*	1.9 (1.5–2.6)*	0.67 (0.50–0.90)*	8.1 (4.9–13)*
Age (≥24)	Reference	1.3 (0.96–1.7)	0.67 (0.50–0.88)*	0.97 (0.75–1.3)	0.57 (0.39–0.82)*
Ethnicity (% White)	Reference	2.8 (1.4–5.6)*	1.3 (0.79–2.0)	0.91 (0.61–1.4)	2.4 (1.1–5.1)*
4-year college (graduate/student)	Reference	0.57 (0.42–0.77)*	1.0 (0.76–1.4)	0.20 (0.15–0.26)*	0.37 (0.26–0.54)*
Other substances
Marijuana: past 30 days	Reference	2.6 (1.7–4.1)*	5.4 (3.7–7.9)*	5.8 (4.0–8.5)*	14 (8.9–21)*
Binge: past 2 weeks	Reference	3.8 (2.8–5.1)*	2.0 (1.5–2.7)*	2.8 (2.1–3.8)*	5.0 (3.4–7.5)*

*p < .05.