Table 2.

Growth Mixture Model Regression Coefficients for BMI Trajectories Age 19–30 Monitoring the Future Study (1986–2009)33

	Single Class Model	Two-Class Model
	Overall	Class 1 (78.3%) (Normative Weight Gain)	Class 2 (21.7%) (Persistently Overweight)
Intercept	23.07***	21.65***	26.76***
Slope (age)	.28***	.22***	.43***
Goodness of Fit	BIC=166471.12	BIC=163571.72
Statistics	AIC=166355.60	AIC=163412.88

^*p<.05

^**p<.01

^***p<.001

^‡p<.10 (two-tailed tests)

(Note: model allows for growth factors to have different variances in each class)