Table 3.

Summary of hierarchical regression analysis of variables predicting behavior.

Variable	Step 1	Step 2	Step 3	Step 4
	β	β	β	β
Risk perception	0.06	0.04	0.00	−0.01
Positive outcome expectancy	0.09 **	0.07 *	0.05	0.04
Negative outcome expectancy	−0.01	−0.01	0.01	0.02
Self-efficacy	0.64 ***	0.58 ***	0.31 ***	0.22 ***
Subjective norms		0.16 ***	0.14 ***	0.07 *
Intention			0.42 ***	0.41 ***
Action planning				0.04
Coping planning				0.15 ***
Action control				0.07*
R2	0.48	0.50	0.58	0.60
F (df1, df2)	150.49 *** (4, 635)	130.30 *** (5, 634)	147.25 *** (6, 633)	108.99 *** (9, 630)

Note. Adjusted R² is reported. *** p < 0.001, ** p < 0.01, * p < 0.05.