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

Published in final edited form as: Psychol Addict Behav. 2017 Aug 14;31(6):664–675. doi: 10.1037/adb0000304

Table 6.

Correlations Between Slope and Intercept Factors Within the Multivariate Latent Growth Model, Prior to and After Adjusting for the Age of Substance Use Initiation

Substances	Baseline	Adjusted
	Slopes
Tobacco and alcohol	−0.13	0.43^***
Tobacco and cannabis	0.12	−0.11
Alcohol and cannabis	−0.08	0.20^*

	Intercepts
Tobacco and alcohol	0.38^***	−0.27^*
Tobacco and cannabis	0.46^***	−0.29^*
Alcohol and cannabis	0.58^***	0.30^***

Notes. The baseline and adjusted models were run using only individuals who reported a valid age of initiation for tobacco, alcohol, and cannabis (n=4,609). In the adjusted multivariate model, the intercept and slope factor for each substance were adjusted for the age of initiation of that substance.

p<.05,

^***

p<.0001.