. Author manuscript; available in PMC: 2012 Feb 1.

Published in final edited form as: J Abnorm Child Psychol. 2011 Feb;39(2):239–250. doi: 10.1007/s10802-010-9456-4

Table 2.

Results for the unconditional model and the conditional (launch) model of the effects of baseline heavy alcohol use on trajectories of physical dating aggression

Parameter	Model
	Unconditional	Launch
Fixed effects
Intercept	0.20 (0.02)^***	0.23 (0.03)^***
Grade	0.07 (0.02)^**	0.05 (0.03)
Grade^*Grade	−0.02 (0.01)^**	−0.01 (0.01)
Early heavy alcohol use	–	0.23 (0.03)^***
Early heavy alcohol use^*grade	–	−0.11 (0.03)^***
Early heavy alcohol	–	0.01 (0.01)^*
use^grade^grade
Random effects (mean)
Intercept	0.09 (0.01)^***	0.05 (0.01)^***

The unconditional model constrained the random effects for the slope (grade) and quadratic (grade^*grade) factors to zero. Residual errors were allowed to vary over time and were significant (p<0.001) across all grade levels. For the launch model heavy alcohol use was drawn from baseline and was grand-mean centered. The launch model controlled for demographic (race, sex and parent education) and baseline psychosocial covariates (family conflict, emotional distress, social bonding, and peer aggression)

p<0.05

^**

p<0.01

^***

p<0.001