Table 3.

Growth curve models for problem behavior indicators with subjects joining the Tier 1 Program as experimental subjects.

	Dependent variables
	DELINQ	DRUG	BEINT	IPS	LPS	Ketamine	Cannabis	Solvent	Ecstasy	Heroin	Sexual	Violence	Night	Trespasses
Intercept
Initial status	.22**	.07**	1.19**	.00	.02**	.00	.00	.03**	.00	.00	.02*	.04**	.05**	.04**
Group	−.03**	−.01	−.02*	.00	−.01	.00	.00	−.01	.00	.00	.00	−.01	−.01	−.01
Gender	−.05**	−.01*	−.04**	.00	.00	.00	.00	.00	.00	.00	−.01*	−.03**	−.03**	−.01
Age	.06**	.04**	.06**	.01*	.01**	.00	.01**	.01	.01**	.00	.02**	.03**	.09**	.02**
Linear
Initial status	.26**	.06**	.21**	.01**	.01**	.02**	.01**	.02**	.01**	.01**	.02**	.05**	.06	.02**
Group	−.03*	−.01**	.00	−.01*	−.01*	−.01*	−.01*	−.01*	−.01*	−.01*	−.005*	−.02*	−.03**	−.01**
Gender	−.01	.00	.01	.001*	−.01*	−.01*	−.01*	−.01*	−.01*	−.01**	−.004*	−.03**	−.02*	−.01*
Age	−.04**	−.01	−.01	−.01*	−.01**	−.01	−.01**	−.01*	−.01*	−.01*	.00	−.02**	−.02*	−.01*
Quadratic
Initial status	−.08	−.01	−.06**	−.002**	−.003**	−.003**	−.002**	−.004**	−.003**	−.002**	—	−.01**	−.01	−.005**
Group	.01	.002*	−.01*	.002*	.001*	.00	.001*	.002*	.002*	.002*	—	.003*	.01**	.002*
Gender	−.01	.00	−.01*	.001*	.00	.00	.00	.00	.001*	.002*	—	.01**	.00	.00
Age	.01	.002*	.00	.00	.002*	.002*	.001*	.00	.00	.00	—	.005**	.003*	.003*
Cubic
Initial status	.01	—	.01**	—	—	—	—	—	—	—	—	—	—	—
Group	.00	—	.002*	—	—	—	—	—	—	—	—	—	—	—
Gender	.00	—	.001*	—	—	—	—	—	—	—	—	—	—	—
Age	.00	—	.00	—	—	—	—	—	—	—	—	—	—	—

Note: DELINQ: scale score of the delinquency scale; DRUG: scale score of the substance abuse scale; BEINT: scale score of the intention of problem behavior scale; IPS: composite score of using illegal drugs (ketamine, cannabis, ecstasy and heroin); LPS: composite score of using legal drugs (organic solvent and cough medicine); Sexual: item score of having sexual behavior with others; Violence: item score of violent behavior; Night: item score of staying outside home overnight without parental approval; Trespasses: item score of trespasses.

*P < 0.05, **P < 0.01.