. Author manuscript; available in PMC: 2018 Feb 1.

Published in final edited form as: Addiction. 2016 Sep 22;112(2):279–287. doi: 10.1111/add.13557

Table 3.

Clinical Characteristics of the Persistent Increasing and Maturing Out Cannabis Use Disorder (CUD) Trajectory Classes

Clinical Characteristic	Class 1 M (SD)	Class 2 M (SD)	F	η ²
Initial age of CUD onset	20.8 (4.1)	17.6 (3.1)	25.97^***	.16
Number of CUD episodes	1.5 (0.7)	1.2 (0.5)	4.84^*	.03
Cumulative duration of CUD in months	90.6 (45.6)	40.2 (39.9)	46.29^***	.26
Rate of cannabis dependence diagnosis	0.56 (0.50)	0.54 (0.50)	0.05	<.01

Note. Class 1 = persistent increasing risk over time; Class 2 = maturing out; M = mean; SD = standard deviation. F-tests obtained from the discriminant function analysis used 1 and 131 degrees of freedom.

p < .05.

^**

p < .01.

^***

p < .001.