B

p^#

R

$R_{\text{change}}^2$

F_change

p^t

Step 1

BMI

−0.088

0.383

Age

−0.032

0.757

Physical activity

0.234

0.027

0.275

0.08

2.62

0.055

Step 2

BMI

0.003

0.967

Age

0.004

0.951

Physical activity

−0.104

0.197

Walking Self-efficacy

0.474

<0.001

Barrier Self-efficacy

−0.006

0.946

Attitude

0.270

<0.001

Social Norm

0.071

0.370

Perceived behavior control

0.234

0.024

0.790

0.55

26.62

<0.001