Table 2.

Multivariate-Adjusted Logistic Regression Model Examining Marijuana Use Among Adolescents

Variable	Marijuana use
	Lifetime		Past 30 days
	Study 1		Study 1		Study 2
	Smokers (n = 111) and nonsmokers (n = 726)	Smokers only (n = 111)	Smokers (n = 111) and nonsmokers (n = 726)	Smokers only (n = 111)	Smokers only (n = 132)
	OR (95% CI)
Gender
Male (reference group)	–	–	–	–	–
Female	0.67 (0.48, 0.93)	0.49 (0.13, 1.89)	0.72 (0.49, 1.06)	1.86 (0.73, 4.74)	1.02 (0.45, 2.30)
Age
≤13–14 (reference group)	–	–	–	–	–
15–16	1.96 (1.08, 3.53)	1.08 (0.17, 6.91)	1.54 (0.78, 3.05)	0.42 (0.07, 2.36)	1.63 (0.31, 8.45)
≥17	3.24 (1.76, 5.97)	0.84 (0.12, 6.147)	2.53 (1.26, 5.11)	0.33 (0.06, 2.01)	1.42 (0.29, 6.97)
Race (%)
White (reference group)		–	–	–	–
Black	2.18 (0.73, 6.52)	–	1.69 (0.47, 6.15)	–	–
Hispanic	0.57 (0.31, 1.06)	0.50 (0.07, 3.36)	0.83 (0.43, 1.61)	0.95 (0.20, 4.46)	–
Other	1.17 (0.70, 1.96)	0.39 (0.05, 2.95)	0.89 (0.47, 1.67)	0.43 (0.10, 1.73)	–
Smoker type (sporadic vs. daily, smokers only)	–	9.21 (0.42, 203.37)	–	1.16 (0.29, 4.65)	–
Smoker (vs. nonsmoker)	10.91 (6.11, 19.47)	–	10.44 (6.22, 17.51)	–	–
Number of cigarettes smoked in the past 30 days (%)
Up to 5 cigs/day (reference group)		–	–	–	–
6–10 cigs/day	4.59 (0.56, 37.56)	0.30 (0.01, 8.13)	1.15 (0.38, 3.48)	0.47 (0.09, 2.49)	1.36 (0.05, 40.47)
1–1.5 pack/day	–	–	1.31 (0.30, 5.78)	2.39 (0.18, 31.59)	1.85 (0.09, 34.82)
2 or more packs/day	11.99 (1.18, 122.15)	0.06 (0.01, 3.41)	24.81 (2.52, 244.17)	1.61 (0.10, 25.52)	1.65 (0.09, 31.96)
Menthol cigarette use (smokers only)	–	5.05 (1.05, 24.25)	–	1.60 (0.58, 4.42)	2.44 (1.10, 5.42)

Note. OR = odds ratio; CI = confidence intervals. Bold values indicate statistically significant values, p < .05