Table 4.

Standardized regression coefficients: age specific models

	Model 1		Model 2		Change (%) (β1 – β2)/β1]* 100
	β	R2	β	R2
Ages 11–13 years	.497***	0.265	.464***	0.304	6.640
Ages 14–17 years	.498***	0.281	.468***	0.322	6.024
Ages 18–21 years	.437***	0.231	.394***	0.350	9.840

^*p < .05

**p < .01

^***p < .001.

Note: Cell entries represent standardized regression coefficients obtained from an OLS regression model in which the dependent variable is SRH (T2). Model 1 controls for sociodemographic (age, race/ethnicity, gender, marital status of mother) and socioeconomic (mother's education and receipt of public assistance) information for all respondents. Models also control for the lag between Wave 1 and Wave 2. Model 2 includes the same controls as Model 1 but also controls for time 1 physical and psychological health and changes in physical and psychological health from time 1 to time 2 (similar to Model 2 of Table 3). Separate models were examined for adolescents ages 11–13 (n = 2158), 14–17 (n = 10310), and 18–21 (n = 1043). Estimates obtained from SVYREG procedure in STATA 8.0 to adjust for design effects and are weighted to reflect the oversampling of certain sociodemographic groups. All data come from Waves I–II of the National Longitudinal Study of Adolescent Health (Udry 1998).