Table 5.

Results of the hierarchical regression analysis: validation of the mediating effect of risk perception

Variables	Step1				Step2
	PH		RP		PH
Control variables
Gender	−0.206*	−0.121	−0.094	−0.106	−0.206*	−0.157*
Age	0.123	0.098	0.000	−0.014	0.123	0.102
Ethnic	−0.054	−0.071	0.051	0.019	−0.054	−0.065
Education	0.178	0.098	−0.093	−0.105	0.178	0.121
Income	0.165	0.127	−0.097	−0.084	0.165	0.148
Housing	−0.154	−0.158*	0.052	0.036	−0.154	−0.140
Independent variables
Exposure		−0.167***		0.298***		−0.132**
Mediating variables
RP						−0.331***
F	1.764	95.671***	4.553***	91.352***	1.413	122.910***
R2	0.005	0.135	0.049	0.161	0.005	0.301
△R2	0.012	0.129***	0.057***	0.123***	0.015	0.164***

* < 0.05; ** < 0.01; *** < 0.001

B unstandardized, beta standardized coefficients, R² explanation rate, △R² change in explanation rate in each step