Table 4 Prediction of device-measured sitting time based on self-reported sitting time
|  | β | 95% CI | R2 |
|---|---|---|---|
Crude model | Â | Â | 0.10 |
 Intercept | 6.86 | 6.74 to 6.97 |  |
 Self-reported sitting time | 0.25 | 0.24 to 0.27 |  |
Optimal model | Â | Â | 0.24 |
 Intercept | 4.18 | 3.84 to 4.51 |  |
 Self-reported sitting time | 0.19 | 0.17 to 0.20 |  |
 Age | 0.03 | 0.03 to 0.04 |  |
 Body mass index | 0.07 | 0.06 to 0.08 |  |
 Physical work demands |  |  |  |
  Mostly sedentary | Ref. | Ref. |  |
  Walking | -0.86 | -1.00 to -0.72 |  |
  Walking and lifting | -1.14 | -1.29 to -0.99 |  |
  Heavy labour | -1.18 | -1.42 to -0.95 |  |
  Not working | -0.64 | -0.77 to -0.51 |  |