Table 5.

Latent transition analysis model with covariates: Black girls

Significance test for covariates (simultaneous entry) as predictors of age 13 (time 1) profile
Covariate	Change in 2*log-likelihood	Degrees of Freedom	p-value
Public Assistance	0.00	2	Not significant
Alcohol Intention	2.02	2	0.36
Marijuana Intention	0.00	2	Not significant
Cigarette Intention	0.00	2	Not significant
Peer alcohol use	0.00	2	Not significant
Peer marijuana use	0.00	2	Not significant
Peer cigarette use	0.00	2	Not significant
Conduct problems	15.78	2	0.0004

Beta and Odds Ratios for age 13 (time 1) profile membership
	No Use	Alcohol Use	Polydrug Use
Intercept
B0’s	reference group	−2.42	−5.86
Odds	reference group	0.09	0.00
Public Assistance
B1’s	reference group	−0.19	0.26
Odds ratios	reference group	0.82	1.30
Alcohol Intention
B2’s	reference group	0.78	−1.04
Odds ratios	reference group	2.19	0.35
Marijuana intention
B3’s	reference group	0.58	1.21
Odds ratios	reference group	1.79	3.36
Cigarette intention
B4’s	reference group	0.20	0.01
Odds ratios	reference group	1.22	1.01
Peer alcohol use
B5’s	reference group	0.36	0.20
Odds ratios	reference group	1.44	1.22
Peer marijuana use
B6’s	reference group	0.06	2.41
Odds ratios	reference group	1.07	11.12
Peer cigarette use
B7’s	reference group	0.41	−0.33
Odds ratios	reference group	1.50	0.72
Conduct problems
B8’s	reference group	1.04	1.70
Odds ratios	reference group	2.83	5.50

Note: n=565. Log-likelihood for overall model: −2758.46. The top part of the table indicates the statistical significance of each covariate (assessed at age 12). Covariates were entered simultaneously as predictors of age 13 substance use profile. The bottom part of the table reports betas and odds ratios for each covariate. Public Assistance: 0=No, 1=Yes. Intention to use: 0=Definitely No, 1=Probably No through Definitely Yes. Peer Use: 0=None, 1=One or more. Conduct Problems: 0=none, 1=1 or more.