Table 4.
Multiple Linear Regression Prediction Models for ActiGraph Measured Sedentary Behavior and Physical Activity
| Model Parameters | Estimate | Break Factor Cutoff |
|---|---|---|
| Sedentary Behavior | ||
| Intercept | 616.5 | |
| GPAQ Moderate-Intensity PA | −0.03 | |
| GPAQ Moderate-Intensity PA Break Factor | − 78.0 | 0.00 |
| GPAQ Vigorous-Intensity PA | −0.45 | |
| Moderate-Intensity PA | ||
| Intercept | 348.2 | |
| SQRT GPAQ Sedentary Behavior | −1.87 | |
| GPAQ Moderate-Intensity PA2 | 1.65 × 10−3 | |
| GPAQ Vigorous-Intensity PA2 | 3.54 × 10− 3 | |
| LOG Age | −65.3 | |
| GPAQ MVPA | −0.07 | |
| GPAQ MVPA Break Factor | 214.9 | 113.6 |
| Interaction: (GPAQ MVPA)*(MVPA Break Factor) | −1.15 | |
| Vigorous-Intensity PA | ||
| Intercept | 10.5 | |
| GPAQ Moderate-Intensity PA2 | 2.91 × 10−5 | |
| GPAQ Vigorous-intensity PA2 | 7.84 × 10−5 | |
| Age | −0.29 | |
| Age Break Factor | −9.77 | 27.6 |
| GPAQ MVPA | −0.01 | |
| GPAQ MVPA Break Factor | 2.14 | 38.6 |
| Interaction: (Age)*(Age Break Factor) | 0.28 | |
| Interaction: (GPAQ MVPA)*(MVPA Break Factor) | −6.55 × 10−3 | |
| MVPA | ||
| Intercept | 540.8 | |
| LOG GPAQ Sedentary Behavior | −12.8 | |
| Age | −15.0 | |
| Age Break Factor | − 356.0 | 29.1 |
| LOG GPAQ MVPA | 5.78 | |
| Interaction: (Age)*(Age Break Factor) | 13.7 | |
GPAQ = Global Physical Activity Questionnaire; PA = physical activity; SQRT = square root; MVPA = moderate- and vigorous-intensity physical activity; * = interaction