TABLE 3

Association of Baseline Multiple Tobacco Product Use and Covariates With Multiple Marijuana Product Outcomes at 24-Month Follow-up

Baseline Regressors, Ever UseOutcome at 24-Mo Follow-up
Combustible MarijuanaVaping MarijuanaMarijuana EdiblesAny Marijuana Product
Current Versus Never, OR (95% CI)Past Versus Never, OR (95% CI)Current Versus Never, OR (95% CI)Past Versus Never, OR (95% CI)Current Versus Never, OR (95% CI)Past Versus Never, OR (95% CI)Current Versus Never, OR (95% CI)Past Versus Never, OR (95% CI)
Unadjusted modelsa
 Combustible cigarettes2.92 (1.61–5.32)***5.73 (3.82–8.59)***2.48 (1.04–5.92)*4.11 (2.56–6.62)***1.82 (0.82–4.06)4.07 (2.69–6.16)***3.10 (1.71–5.60)***5.98 (3.99–8.98)***
 E-cigarettes4.72 (3.27–6.79)***4.56 (3.43–6.06)***3.27 (1.83–5.87)***3.21 (2.24–4.60)***4.34 (2.77–6.80)***3.93 (2.92–5.29)***5.45 (3.81–7.80)***4.74 (3.58–6.27)***
 Hookah5.54 (3.73–8.22)***4.61 (3.29–6.47)***5.36 (3.04–9.47)***4.19 (2.81–6.24)***5.69 (3.56–9.11)***4.68 (3.31–6.60)***5.89 (3.97–8.74)***4.89 (3.49–6.86)***
 Any product5.37 (3.94–7.31)***5.02 (3.95–6.40)***4.14 (2.52–6.79)***4.42 (3.24–6.03)***5.10 (3.45–7.53)***4.50 (3.48–5.82)***5.96 (4.40–8.07)***5.26 (4.16–6.65)***
 No. products3.13 (2.53–3.88)***3.30 (2.76–3.94)***2.43 (1.81–3.27)***2.52 (2.06–3.07)***2.74 (2.13–3.51)***2.84 (2.38–3.39)***3.43 (2.76–4.26)***3.50 (2.93–4.19)***
Adjusted modelsb
 Combustible cigarettes1.90 (1.01–3.57)*4.16 (2.70–6.41)***1.54 (0.62–3.87)2.90 (1.75–4.79)***1.06 (0.46–2.45)2.77 (1.77–4.32)***1.97 (1.05–3.68)*4.30 (2.79–6.63)***
 E-cigarettes3.15 (2.14–4.64)***3.42 (2.53–4.63)***2.08 (1.12–3.86)*2.38 (1.63–3.47)***2.99 (1.86–4.79)***2.85 (2.08–3.91)***3.67 (2.51–5.36)***3.63 (2.69–4.90)***
 Hookah3.91 (2.56–5.97)***3.40 (2.37–4.86)***3.79 (2.05–7.01)***2.95 (1.94–4.50)***3.94 (2.39–6.48)***3.20 (2.22–4.61)***4.10 (2.69–6.25)***3.55 (2.49–5.08)***
 Any product3.79 (2.73–5.27)***3.81 (2.95–4.92)***2.90 (1.70–4.93)***3.33 (2.40–4.62)***3.59 (2.38–5.43)***3.26 (2.48–4.28)***4.21 (3.05–5.81)***4.00 (3.12–5.14)***
 No. products2.55 (2.01–3.24)***2.80 (2.30–3.40)***1.94 (1.38–2.71)***2.11 (1.70–2.63)***2.19 (1.66–2.89)***2.31 (1.90–2.80)***2.77 (2.18–3.51)***2.95 (2.42–3.59)***
Combined adjusted modelsb
 Combustible cigarettes1.39 (0.72–2.68)3.16 (2.01–4.96)***1.13 (0.44–2.96)2.22 (1.31–3.76)**0.73 (0.31–1.74)2.06 (1.29–3.28)**1.43 (0.75–2.74)3.27 (2.08–5.14)***
 E-cigarettes2.41 (1.60–3.65)***2.66 (1.93–3.68)***1.30 (0.65–2.58)1.81 (1.21–2.72)**2.22 (1.33–3.71)**2.20 (1.57–3.08)***2.87 (1.91–4.30)***2.86 (2.09–3.94)***
 Hookah3.04 (1.94–4.76)***2.38 (1.62–3.49)***3.47 (1.79–6.75)***2.25 (1.44–3.53)***3.19 (1.88–5.41)***2.37 (1.61–3.50)***3.07 (1.97–4.80)***2.49 (1.70–3.65)***
  • a Unadjusted models include only the respective baseline tobacco product variable as the sole regressor.

  • b Adjusted models include the respective baseline tobacco product variable, age, sex, race and/or ethnicity, parental education, family history of combustible cigarette and drug use, peer combustible cigarette use and marijuana use, TCI Impulsivity subscale, and CESD as simultaneous regressors. Combined adjusted models include all baseline tobacco products as simultaneous predictors and all covariate regressors.

  • * P < .05; ** P < .01; *** P < .001.