Table V.

Linear growth estimates of mean MAAS scores across 13 months

Growth factors	B	SE	P-value
Unadjusted model
Mean†
Intercept	4.095	0.020	*
Slope	0.012	0.002	*
Variance
Intercept	1.685	0.050	*
Slope	0.008	0.001	*
Covariance	−0.073	0.004	*
Covariate adjusted model
Mean
Intercept	1.803	0.078	*
Slope	0.012	0.008
Variance
Intercept	0.908	0.037	*
Slope	0.004	0.001	*
Covariance	−0.037	0.003	*
Covariates‡
Intercept
Gender (male)	−0.096	0.019	*
Age	0.154	0.004	*
Parent education	0.041	0.007	*
School type	0.009	0.007
Slope
Gender (male)	0.009	0.002	*
Age	−0.003	0.001	*
Parent education	0.006	0.001	*
School type	0.010	0.001	*

Notes:

^†Intercept = average initial MAAS level; slope = linear growth in average MAAS level; Intercept = range of individual differences around the average initial MAAS level; slope = range of individual differences in the rate of linear increases in MAAS level over time.

^‡Estimates from intercept and slope growth factors regressed on covariates.

^*p < 0.01.