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. Author manuscript; available in PMC: 2019 Dec 6.
Published in final edited form as: Subst Use Misuse. 2018 Jul 2;53(14):2310–2319. doi: 10.1080/10826084.2018.1473437

Table 3.

Correlates of Past 30-day Cannabis and Tobacco Use Relative to Tobacco-Only Use (reference group) as a function of Tobacco Product Consumed

Logistic Model 1 Logistic Model 2 Logistic Model 3 Logistic Model 4
Past 30-day Tobacco Users
of Any Type
Past 30-day Cigarette
Users
Past 30-day Smokeless
Tobacco Users
Past 30-day Cigar Users
n=1390
n=883
n=593
n=779
Characteristics AOR 95% CI AOR 95% CI AOR 95% CI AOR 95% CI
LL UL LL UL LL UL LL UL

Age
 ≤14 years Ref Ref Ref Ref
 ≥15 years 1.38 0.89 2.16 1.24 0.67 2.30 1.69 0.80 3.57 1.75 0.78 3.93
Race/ethnicity
 White NH Ref Ref Ref Ref
 Black NH 1.90 0.94 3.86 2.62 1.15 5.96 1.35 0.42 4.34 1.94 0.81 4.65
 Other 1.62 1.01 2.57 1.57 0.90 2.76 1.31 0.73 2.35 2.05 1.06 3.97
Gender
 Male Ref Ref Ref Ref
 Female 1.17 0.75 1.81 0.96 0.56 1.65 1.03 0.43 2.46 1.36 0.87 2.11
Past 30-day cigarette use
 0 days Ref - Ref Ref
 1–2 days 1.08 0.69 1.68 Ref 2.94 1.30 6.66 0.96 0.44 2.12
 3–9 days 2.21 1.24 3.95 1.86 1.00 3.45 3.27 1.27 8.40 1.78 0.69 4.64
 ≥10 days 2.13 1.20 3.80 1.76 1.04 2.98 3.91 1.55 9.89 0.90 0.47 1.73
Past 30-day smokeless use
 0 days Ref Ref - Ref
 1–2 days 0.63 0.36 1.08 0.78 0.34 1.78 Ref 0.62 0.27 1.43
 3–9 days 0.59 0.31 1.13 0.82 0.36 1.86 0.90 0.42 1.90 0.58 0.20 1.65
 ≥10 days 0.42 0.25 0.68 0.73 0.40 1.35 0.52 0.30 0.89 0.63 0.30 1.34
Past 30-day cigar use
 0 days Ref Ref Ref -
 1–2 days 1.26 0.76 2.10 0.73 0.35 1.49 0.92 0.33 2.56 Ref
 3–9 days 2.24 1.42 3.54 1.47 0.82 2.65 1.79 0.91 3.51 1.84 1.01 3.34
 ≥10 days 2.40 1.25 4.62 1.39 0.67 2.90 2.36 0.96 5.85 2.33 1.02 5.32
Past 30-day alcohol use
 0 days Ref Ref Ref Ref
 1–2 days 2.05 1.12 3.74 2.86 1.27 6.47 1.79 0.68 4.71 1.58 0.78 3.17
 3–9 days 3.87 2.22 6.75 4.66 2.30 9.42 2.53 0.82 7.82 4.70 2.08 10.60
 ≥10 days 4.94 2.39 10.22 5.67 2.21 14.52 5.54 1.53 20.00 5.02 1.68 14.93
Lifetime other illegal drug use
 None Ref Ref Ref Ref
 ≥1 drug 2.00 1.37 2.90 2.06 1.30 3.27 2.56 1.52 4.31 1.93 1.14 3.27
Lifetime prescription drug misuse
 None Ref Ref Ref Ref
 ≥1 drug 2.28 1.58 3.29 3.14 1.86 5.30 3.09 1.60 5.99 2.09 1.22 3.59

Note: AOR = adjusted odds ratio; CI = confidence interval; LL=Lower limit; UL=Upper limit; Ref = reference subgroup. All items listed were included in each model tested. Bolded items have a significant association in at least one model (p<0.05). Participants included in models 2–4 were not mutually exclusive; that is, all participants in model 2 reported cigarette smoking, all participants in model 3 reported smokeless tobacco use, and all participants in model 4 reported cigar smoking. AOR greater than 1 indicates greater likelihood of concurrent tobacco and cannabis use compared to tobacco-only use (reference subgroup). Frequencies are rounded to the nearest whole number and based on the frequency and standard deviation of the five imputed datasets.