. Author manuscript; available in PMC: 2020 Apr 1.

Published in final edited form as: Addiction. 2018 Dec 18;114(4):674–686. doi: 10.1111/add.14506

Table 5.

Separate adjusted logistic regression models of the association between marijuana use (outcome) and risk preference (exposure) items among adolescents from 2002–2014

*Risk Preference*	*Log odds of marijuana use*
	Model 5.1a	Model 5.2a	Model 5.3a
	Coef. (95% CI)	Coef. (95% CI)	Coef. (95% CI)
Getting a kick out of doing something dangerous	1.44 (1.39, 1.50)^***	1.89 (177, 2.01)^***	1.31 (1.12, 1.50)^***
Year (2002 to 2007)	−0.05 (−0.06, −0.04)^***	−0.05 (−0.06, −0.04)^***	−0.08 (−0.11, −0.04)^***
Spline (2007 to 2014)	0.02 (0.01, 0.03)^***	0.02 (0.01, 0.03)^***	0.05 (0.03, 0.07)^***
Male	0.05 (0.01, 0.08)^*	0.40 (0.31, 0.49)^***	0.05 (0.01, 0.08)^*
Age (15–17 year-olds)	1.65 (1.61, 1.69)^***	1.92 (1.80, 2.04)^***	1.65 (1.61, 1.69)^***
Getting a kick x male	-	−0.41 (−0.50, −0.31)^***	-
Getting a kick x age	-	−0.32 (−0.45, −0.19)^***	-
Getting a kick x year	-	-	0.03 (−0.003, 0.07)
Getting a kick x spline	-	-	−0.06 (−0.12, −0.01)^*
	Model 5.1b	Model 5.2b	Model 5.3b
	Coef. (95% CI)	Coef. (95% CI)	Coef. (95% CI)
Testing oneself by doing something risky	1.16 (1.11, 1.21)^***	1.69 (1.57, 1.82)^***	1.14 (0.96, 1.31)^***
Year (2002 to 2007)	−0.05 (−0.06, −0.04)^***	−0.05 (−0.06, −0.04)^***	−0.06 (−0.09, −0.03)^***
Spline (2007 to 2014)	0.02 (0.01, 0.03)^***	0.02 (0.01, 0.03)^***	0.03 (0.01, 0.05)^***
Male	0.05 (0.01, 0.09)^**	0.42 (0.34, 0.51)^***	0.05 (0.01, 0,09)^**
Age (15–17 year-olds)	1.69 (1.65, 1.73)^***	2.03 (1.91, 2.14)^***	1.69 (1.65, 1.73)^***
Testing oneself x male	-	−0.44 (−0.53, −0.35)^***	-
Testing oneself x age	-	−0.40 (−0.52, −0.28)^***	-
Testing oneself x year	-	-	0.01 (−0.02, 0.04)
Testing oneself x spline	-	-	−0.03 (−0.08, 0.03)

p≤0.05;

^**

p≤0.01

^***

p≤0.001

Note: All models were adjusted for gender, age, race/ethnicity and family income. A linear spline was used for the association between year and marijuana use with a knot at 2007