Table 3.

Summary of Hierarchical Regression Analysis of Parent-Proxy Report of Three Dimensions of Child Risk on Covariates, Asthma-Related Functional Morbidity, and Parent Self-Perceived Risk

	PV-child (n = 240)					PE-child (n = 239)					OB-child (n = 234)
Variable	$R_{\text{total}}^2$	ΔR2	ΔF	dfs	β	$R_{\text{total}}^2$	ΔR2	ΔF	dfs	β	$R_{\text{total}}^2$	ΔR2	ΔF	dfs	β
Step 1	.023	.023	2.73	2, 229		.041	.041	4.89**	3, 229		.006	.006	0.67	2, 224
Child age					−.148*					−.202**					−.013
Parent asthma					−.036					.011					−.076
Step 2	.062	.038	3.07*	3, 226		.080	.039	3.21*	3, 226		.043	.037	2.85*	3, 221
Child age					−.182**					−.221***					.022
Parent asthma					−.046					.017					−.059
Child asthma-related functional morbidity					.056					−.056					−.076
Home secondhand smoke exposure					.098					.145					−.021
Child secondhand smoke exposure					.114				.077						−.165*
Step 3	.137	.075	6.46***	3, 223		.125	.045	3.85**	3, 232		.119	.076	6.27***	3, 218
Child age					−.176**				−.215**						−.005
Parent asthma					−.067				.003						−.048
Child asthma-related functional morbidity					.028				−.075						−.064
Home secondhand smoke exposure					.071				.124						.003
Child secondhand smoke exposure					.097				.064						−.142
PV-self					.295***				.229***						−.254***
PE-self					−.046				−.025						−.109
OB-self					.076				.067						−.100

Note. PV = Perceived Vulnerability; PE = Precaution Effectiveness; OB = Optimistic Bias.

^*p < .05.

^**p ≤ .01.

^***p ≤ .001.