Table II.
Random effect regression for accelerometer derived PA data
| Sedentary behaviour (minutes day−1) |
LPA (minutes day−1) |
MPA (minutes day−1) |
VPA (minutes day−1) |
Total counts (vertical axis) |
Counts per minute (vertical axis) |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| b | Sx | b | Sx | b | Sx | b | Sx | b | Sx | b | Sx | |
| Fixed effect | ||||||||||||
| Age | 0.0 | 1.4 | 0.45 | 1.00 | −0.081 | 0.367 | −0.408 | 0.226 | −12,903.9 | 16,917.1 | −3.6 | 3.0 |
| Gender (male) | 21.2 | 31.9 | −55.79 | 23.18** | −2.736 | 8.625 | −2.412 | 5.226 | −239,786.1 | 393,635.7 | −7.0 | 69.1 |
| Body fat | 2.3 | 1.7 | −1.40 | 1.26 | −0.502 | 0.463 | −0.774 | 0.285** | −46,066.0 | 20,961.4* | −9.5 | 3.7* |
| Wear time | 20.4 | 4.8*** | 15.46 | 4.60** | 1.724 | 1.645 | 1.108 | 1.163 | 62,024.8 | 84,961.2 | −3.2 | 14.9 |
| Time | 2.2 | 2.1 | −0.51 | 1.62 | −1.048 | 0.667 | −1.746 | 0.536** | −287,381.8 | 44,003.0*** | −38.1 | 7.7*** |
| Previous marathon experience | −10.3 | 26.7 | −4.54 | 19.64 | −9.800 | 7.426 | −2.085 | 4.462 | −451,945.0 | 332,312.6 | −65.3 | 58.3 |
| Intercept | 519.9 | 14.1*** | 241.82 | 9.21*** | 40.607 | 3.476*** | 18.061 | 2.121*** | 2,311,233.0 | 179,014.6*** | 492.0 | 31.4*** |
| Random effect | ||||||||||||
| Sigma_u | 52.9 | 40.50 | 14.50 | 8.33 | 591,558.2 | 103.6 | ||||||
| Sigma_e | 38.4 | 33.63 | 13.73 | 12.12 | 824,557.3 | 143.2 | ||||||
Notes: Age, gender, body fat, wear time, and previous marathon experience were all mean-centred. Sigma_u: Standard deviation of residuals within individuals; Sigma_e: standard deviation of overall error term; Sedentary behaviour: <100 counts-minute−1; LPA, light-intensity PA: 100–1951 countsηminute−1; MPA, moderate-intensity PA: 1951–5724 countsηminute−1; VPA, vigorous-intensity PA: >5725 countsηminute−1.
*
p < .05.
**
p < .01.
***
p < .001.