B

SE B

Wald χ²

p

OR

Step 1

BMI

−0.018

0.037

0.235

0.628

0.982

Age

0.037

0.021

3.260

0.071

1.038

Physical activity

0.031

0.013

5.742

0.017

1.032

Model χ² = 9.12, p = 0.028

Pseudo R² = 0.13

Step 2

BMI

−0.021

0.042

0.261

0.610

0.979

Age

0.042

0.023

3.487

0.062

1.043

Physical activity

0.027

0.016

2.784

0.095

1.027

Walking Self-efficacy

0.019

0.017

1.248

0.264

1.019

Barrier Self-efficacy

0.006

0.018

0.126

0.723

1.006

Attitude

−0.038

0.072

0.283

0.595

0.962

Social Norm

−0.022

0.089

0.063

0.801

0.978

Perceived behavior control

−0.151

0.086

3.068

0.080

0.860

Intention

0.294

0.129

5.224

0.022

1.342

Model χ² = 24.52, p = 0.004

Pseudo R² = 0.31; R² change = 0.18