Table 3.

Fit Statistics and Parameter Estimates for Linear Growth Curve Models of Past Month Marijuana Frequency

	Model	Χ2	AICa	Adj BICb	CFIc	RMSEAd	SRMRe	Inter- cept	Slope	COLf Effect	COLf X Initial (Wave 2) Status
1	Control (n=292)	0.17	3925	3928	1.0	.000	0.01	2.97g	0.03	n/a	n/a
2	COL (n=279)	0.33	3913	3916	1.0	.000	0.02	1.98g	0.54g	n/a	n/a
3	Two-Group (n=571)	1.67	7838	7850	1.0	.000	0.04	2.38g	0.21	0.26	n/a
4	Two-Group w/Inter (n=571)	1.60	7840	7853	1.0	.000	0.04	2.38g	0.22	0.28	0.03

^aAkaike Information Criterion

^bBayesian information criterion

^cComparative Fit Index

^dRoot Mean Square Error of Approximation

^eStandardized Root Mean Square Residual

^fCOL=Intervention Group.

^gp<.0001