| Model 1 | Model 2 | Model 3 | Model 4 | ||||
---|---|---|---|---|---|---|---|---|
Beta | P value | Beta | P value | Beta | P value | Beta | P value | |
Variables | ||||||||
 Age | −0.19 | <.001 | −0.19 | <.001 | −0.13 | <.001 | −0.13 | 0.44 |
 Sex (1 = female) | −0.10 | <.001 | −0.11 | <.001 | −0.09 | <.001 | −0.09 | <.001 |
 Education | 0.01 | .76 | 0.01 | .57 | 0.02 | .36 | 0.02 | 0.22 |
 Marital status (1 = married) | 0.04 | .03 | 0.05 | .03 | 0.01 | .63 | 0.01 | 0.47 |
 Areas (1 = urban) | 0.02 | .21 | 0.03 | .19 | 0.02 | .27 | 0.02 | 0.24 |
 Income | −0.04 | .03 | −0.04 | .07 | −0.04 | .02 | − 0.04 | .04 |
 Knowledge | N/A | N/A | −0.10 | <.001 | N/A | N/A | −0.11 | <.001 |
 Negative emotion | N/A | N/A | N/A | N/A | 0.34 | <.001 | 0.34 | <.001 |
 Risk perception | N/A | N/A | N/A | N/A | 0.04 | .01 | 0.05 | .007 |
 R2 (%) | 3.80 |  | 4.80 |  | 15.90 |  | 17.00 |  |