Table 3.
Summary of logistic regression models testing significance of main and interaction effects of UTAUT-related scales and body mass index.
| Model | Beta | SE (beta) | P value | |
| Model 1 |
|
|
|
|
| Performance expectancy scale | 0.20 | 0.03 | .05 | |
| BMIa | –1.33 | 0.53 | .01 | |
| BMI × performance expectancy scale | 0.10 | 0.05 | <.001 | |
| Model 2 |
|
|
|
|
| Effort expectancy scale | 0.17 | 0.03 | <.001 | |
| BMI | –0.81 | 0.59 | .17 | |
| BMI × effort expectancy scale | 0.04 | 0.05 | .44 | |
| Model 3 |
|
|
|
|
| Social influence scale | 0.35 | 0.04 | <.001 | |
| BMI | –0.88 | 0.56 | .12 | |
| BMI × social influence scale | 0.08 | 0.08 | .29 | |
aBMI: body mass index. BMI was divided into two levels: 0 = normal range of Chinese people (18.5-24 kg/m2) and 1 = beyond normal range.