Table 3.
Hierarchical linear models for Actigraph measured sedentary and physical activity behaviours
| Sedentary behaviour (min/day) |
LPA (min/day) | LMPA (min/day) | MPA (min/day) | VPA (min/day) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Fixed effect | b | (SE) | b | (SE) | b | (SE) | b | (SE) | b | (SE) |
| Intercept, β00 | 384.62 | (7.70)*** | 69.33 | (4.04)*** | 25.93 | (2.58)*** | 13.03 | (1.28)*** | 0.18 | (0.08)* |
| Age, β01 | 0.34 | (0.60) | 0.42 | (0.41) | 0.25 | (0.17) | 0.11 | (0.15) | 0.00 | (0.01) |
| Male, β02 | 26.89 | (17.95) | −8.22 | (10.77) | 6.25 | (5.43) | 4.19 | (3.02) | 0.50 | (0.26) |
| White, β03 | −9.64 | (20.57) | −21.38 | (19.89) | −5.52 | (10.71) | 3.14 | (2.17) | 0.00 | (0.16) |
| Education, β04 | 3.68 | (10.72) | −2.51 | (5.95) | −1.27 | (2.63) | 1.05 | (1.78) | 0.07 | (0.09) |
| BMI, β05 | −1.46 | (0.98) | 0.63 | (0.51) | 0.35 | (0.22) | −0.23 | (0.18) | −0.01 | (0.01) |
| Time 2, π1 | −14.59 | (5.45)* | 5.87 | (2.92) | 4.11 | (1.43)** | 3.12 | (1.03)** | 0.29 | (0.16) |
| Random effect | Variance | [χ2] | Variance | [χ2] | Variance | [χ2] | Variance | [χ2] | Variance | [χ2] |
| Between-subject, r0 | 3418.24 | [303.85]*** | 938.64 | [288.98]*** | 423.76 | [574.06]*** | 90.93 | [249.07]*** | 0.09 | [75.24] |
| Δ(time 2−time1), r1 | 268.38 | [76.13] | 73.24 | [75.51] | 35.20 | [88.16]* | 12.95 | [80.44] | 0.99 | [145.26]*** |
| Within-subject, e | 875.13 | 254.00 | 52.25 | 29.59 | 0.41 | |||||
Sedentary behaviour: <100 cpm; LPA: 100–759 cpm; LMPA: 760–1951 cpm; MPA: 1952–5724 cpm; VPA: ≥5725 cpm.
*
p<0.05;
**
p<0.01;
***
p<0.001.
BMI, body mass index; LMPA, lifestyle moderate-intensity physical activity; LPA, light-intensity physical activity; MPA, moderate-intensity physical activity; VPA, vigorous-intensity physical activity.
b, unstandarised beta.