Table 3.

Estimated adjusted Odds Ratios (OR) of tobacco and cannabis use and poly-use trajectory membership.

	Young adult-onset Poly-substance/poly-product users Vs non-users	Decreasing moderate Poly-substance/poly-product users Vs non-users	Increasing predominately Cannabis Poly-product users Vs non-users	Chronic Poly-substance/poly-product users Vs non-users
	OR(95%CI)	OR(95%CI)	OR(95%CI)	OR(95%CI)
Age (years) at baseline	0.80(0.59–1.09)	1.33(0.89–1.98)	0.76(0.49–1.18)	1.13(0.74–1.71)
Highest parental education levela	1.39(1.03–1.88)	1.02(0.72–1.43)	0.15(0.81–1.62)	1.31(0.85–2.01)
Female vs. male	1.30(1.02–1.66)	1.00(0.73–1.37)	0.93(0.69–1.27)	0.73(0.52–1.02)
Race/Ethnicityb
Asian vs. non-Asian	0.67(0.46–0.97)	0.38(0.20–0.71)	0.73(0.40–1.32)	0.55(0.28–0.1.10)
Latino vs. non-Latino	0.68(0.49–0.95)	0.88(0.59–1.32)	1.20(0.76–1.90)	0.83(0.51–1.36)
NHc White vs. non-NH White	0.70(0.48–1.04)	0.61(0.36–1.05)	1.34(0.79–2.27)	2.24(1.37–3.67)
Lifetime tobacco use at baseline (wave 1)	2.57(1.88–3.53)	3.41(2.33–4.99)	4.70(3.19–6.92)	8.91(5.80–13.69)
Lifetime Cannabis use at baseline (wave 1)	1.19(0.73–1.93)	3.46(2.22–5.40)	2.51(1.59–3.95)	4.27(1.72–6.71)

^aHighest parental education level was college degree or higher vs. some college or less.

^bRace/ethnicity modeled as dummy-coded variables.

^cNon-Hispanic.