Table 1.

Multivariate Multinomial Logistic Regression of Marijuana Trajectory: Early Risk Factors in Childhood^§

	Adolescent Only vs. Abstainers OR (95% CI)	Late Starters vs. Abstainers OR (95% CI)	Persistent Users vs. Abstainers OR (95% CI)
Males (n=455)
Family background
-mother education (0=12+; 1=0–11)	0.89 (0.44, 1.80)	0.52 (0.25, 1.10)	1.35 (0.78, 2.33)
-teenage parenting (0=no; 1=yes)	0.81 (0.40, 1.62)	0.90 (0.43, 1.92)	0.93 (0.55, 1.57)
Classroom behavior rated by teacher
Shy behavior (0=no; 1=yes)	0.55 (0.24, 1.26)	1.55 (0.74,3.26)	0.71 (0.40, 1.24)
Aggressive behavior (0=no; 1=yes)	1.05 (0.49, 2.26)	2.13 (1.01, 4.55)*	1.14 (0.66, 1.97)
Academic achievement
-MRT scores (0=low to superior; 1=immature)	0.50 (0.15, 1.65)	0.67 (0.23, 1.96)	0.98 (0.44, 2.18)
-Math grade (0=A or B; 1=C or D)	0.99 (0.47, 2.09)	1.25 (0.53, 2.96)	0.95 (0.53, 1.71)
Females (n=495)
Family background
-Mother education (0=12+; 1=0–11)	0.91 (0.50, 1.68)		0.76 (0.47, 1.24)
-Teenage parenting (0=no; 1=yes)	0.57 (0.30, 1.10)		1.01 (0.60, 1.70)
Classroom behavior rated by teacher
Shy behavior (0=no; 1=yes)	2.51 (1.34, 4.72)*		1.14 (0.67, 1.96)
Aggressive behavior (0=no; 1=yes)	0.84 (0.40, 1.75)		1.49 (0.87, 2.55)
Academic achievement
-MRT scores (0=low to superior; 1=immature)	0.65 (0.24, 1.79)		0.78 (0.33, 1.80)
-Math grade (0=A or B; 1=C or D)	1.01 (0.52, 1.94)		0.80 (0.43, 1.49)

Note:

^*p<.05

^§Mutlivariate models used multiple imputation (STATA ICE module) to account for missing data.