Table 3.

Predictors of trajectories of sexual risk in multiple hierarchical linear regressions, NLSY, 1997–2007^*

	Model 1			Model 2			Model 3
Age and race models	Estimate	95% CI	p Value	Estimate	95% CI	p Value	Estimate	95% CI	p Value
Main effects
Black race	–0.07	–0.12 to –0.02	0.005	0.39	0.28 to 0.51	<0.0001	0.28	0.16 to 0.41	<0.0001
Age	0.25	0.23 to 0.26	<0.0001	0.28	0.26 to 0.30	<0.0001	0.28	0.26 to 0.30	<0.0001
Interactions
Black race × age	–	–	–	–0.99	–0.13 to –0.06	<0.0001	–0.09	–0.13 to –0.06	<0.0001
Age2	–0.011	–0.013 to –0.010	<0.0001	–0.012	–0.014 to –0.011	<0.0001	–0.012	–0.014 to –0.011	<0.0001
Black race × age2	–	–	–	0.002	0.000 to 0.005	0.059	0.002	–0.0001 to 0.005	0.061

	Model 4			Model 5			Model 6
Hypersegregation models	Estimate	95% CI	p Value	Estimate	95% CI	p Value	Estimate	95% CI	p Value
Main effects
Black race	0.28	0.16 to 0.41	<0.0001	0.24	0.09 to 0.39	0.002	0.27	0.13 to 0.40	<0.0001
Age	0.28	0.26 to 0.30	<0.0001	0.29	0.26 to 0.31	<0.0001	0.28	0.26 to 0.30	<0.0001
Hypersegregation	0.02	–0.05 to 0.09	0.642	0.06	–0.11 to 0.22	0.493	–0.01	–0.10 to 0.08	0.815
Interactions
Black race × age	–0.09	–0.13 to –0.06	<0.0001	–0.08	–0.12 to –0.04	0.0001	–0.09	–0.13 to –0.06	<0.0001
Age2	–0.012	–0.014 to –0.011	<0.0001	–0.013	–0.014 to –0.011	<0.0001	–0.012	–0.014 to –0.011	<0.0001
Black race × age2	0.002	–0.0001 to 0.005	0.062	0.002	–0.001 to 0.005	0.302	0.002	–0.0001 to 0.005	0.062
Hypersegregation × black race				0.12	–0.13 to 0.37	0.350	0.06	–0.05 to 0.17	0.267
Hypersegregation × age				–0.02	–0.07 to 0.03	0.408
Hypersegregation × black race × age				–0.02	–0.10 to 0.05	0.515
Hypersegregation × age2				0.001	–0.002 to 0.004	0.503
Hypersegregation × black race × age2				0.002	–0.003 to 0.007	0.459
Joint test of significance
Hypersegregation grouped variables						0.085			0.287

Age is centred at 14.

^*Models 1 and 2 only included the variables shown (unadjusted) and models 3, 4, 5 and 6 included all covariates (adjusted).

NLSY, National Longitudinal Survey of Youth.