Table 3.

The 10 Year Latent Class Growth Model Characteristics for Alcohol/Drug Use: 6 Class Solution.

Latent class	%Sample	Alcohol frequency			Drug frequency
		Intercept (SE)	Slope(SE)	Quadratic(SE)	Intercept (SE)	Slope(SE)	Quadratic(SE)
1. Abstainers/Infrequent Users	28.7%	−0.27(.31)	0.05(.71)	0.39(.36)	−1.35(.50)*	0.73(1.4)	−0.32(.64)
2. Late Adolescent Resurgence	17.6%	1.35(.17)*	3.25(.48)*	−1.64(.28)*	2.96(.24)*	1.18(.66)	−0.97(.36)*
3. Emerging Adult Resurgence	14.4%	−0.54(.53)	4.68(.78)*	−1.77(.30)*	−4.81(1.1)*	12.58(1.8)*	−4.78(.72)*
4. Frequent Drinkers	16.3%	2.09(.20)*	0.55(.54)	−0.16(.25)	2.50(.21)*	−4.39(.91)*	1.57(.59)*
5. Frequent Drinkers/Drug Dependent	17.0%	1.22(.15)*	1.80(.45)*	−0.51(.23)*	1.35(.17)*	2.37(.37)*	−0.71(.19)*
6. Chronic	6.0%	3.11(.11)*	−0.02(.39)	0.23(.29)	3.70(.15)*	−0.90(.56)	0.38(.34)

^*p< .05