Table 3.

Regression models for each of the four explanatory variables predicting injury prevention behaviors

	Main effects				Main effects and interactions
	b	95% CI	β	p Value	B	95% CI	β	P Value
Race	0.05	0.03 to 0.06	0.22	<0.001	0.05	0.03 to 0.06	0.22	<0.001
Age	−0.01	−0.01 to −0.00	−0.17	<0.001	−0.02	−0.03 to −0.01	−0.37	<0.001
Outcome expectations	0.11	0.08 to 0.14	0.31	<0.001	0.06	0.00 to 0.03	0.16	0.05
Outcome expectations × age					0.02	0.00 to 0.03	0.27	0.03
	Adj r2 = 0.145; F = 31.15**				Adj r2 = 0.151; F change = 4.86*
Race	0.03	0.02 to 0.5	0.15	<0.001	0.03	0.02 to 0.05	0.15	<0.001
Age	−0.01	−0.01 to −0.01	−0.17	<0.001	−0.01	−0.01 to −0.01	−0.17	<0.001
Attitudes	0.11	0.07 to 0.15	0.20	<0.001	20.03	20.16 to 0.09	20.06	0.60
Birth order	0.01	0.01 to 0.03	0.01	0.31	0.08	0.02 to 0.15	0.39	0.01
Attitudes × birth order					0.10	0.02 to 0.19	0.46	0.02
	Adj r2 = 0.086; F = 14.61**				Adj r2 = 0.093; F change = 5.56*
Race	0.04	0.02 to 0.05	0.18	<0.001	0.04	0.02 to 0.05	0.18	<0.001
Age	−0.01	−0.05 to −0.02	−0.17	<0.001	−0.02	−0.03 to −0.01	−0.45	<0.001
Social norms	0.06	0.03 to 0.08	0.17	<0.001	20.00	20.05 to 0.05	20.01	0.94
Social norms × age					0.02	0.00 to 0.03	0.35	0.01
	Adj r2 = 0.081; F = 16.63**				Adj r2 = 0.090; F change = 6.17*
Race	0.04	0.02 to 0.05	0.17	<0.001
Age	−0.01	−0.05 to −0.02	−0.17	<0.001
Barriers	−0.01	−0.02 to −0.00	−0.13	0.002
	Adj r2 = 0.070; F = 14.21**

^*p < 0.05;

^**p < 0.001; b, unstandardized beta; β, standardized beta.