Table 3.
Mixed linear regression analysis of resemblance of physical activity within families, within parent-child dyads, and within parent-child dyads by the age of the childa, N = 1837
| The total family (N = 1837) |
Parent-child (dyads n = 558) |
Age group 0–6 y (dyads n = 126) |
Age group 7–11 y (dyads n = 257) |
Age group 12–22 y (dyads n = 271) |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ICC | 95% CI | p value | ICC | 95% CI | p value | ICC | 95% CI | p value | ICC | 95% CI | p value | ICC | 95% CI | p value | |
| CPM | 0.12 | (0.08; 0.19) | < 0.01 | 0.02 | (0.00; 0.62) | 0.32 | 0.08 | (0.01; 0.48) | 0.39 | 0.03 | – | – | 0.06 | (0.01; 0.36) | 0.01 |
| LPA | 0.22 | (0.17; 0.28) | < 0.01 | 0.19 | (0.12; 0.29) | < 0.01 | 0.04 | (0.00; 0.82) | 0.36 | 0.17 | (0.08; 0.32) | < 0.01 | 0.17 | (0.08; 0.32) | < 0.01 |
| MVPA | 0.07 | (0.03; 0.14) | < 0.01 | < 0.01 | – | – | < 0.01 | – | – | 0.06 | (0.01; 0.36) | 0.23 | 0.12 | (0.05; 0.29) | 0.16 |
| VPA | 0.06 | (0.02; 0.13) | 0.01 | < 0.01 | – | – | < 0.01 | – | – | 0.02 | – | – | 0.07 | (0.01; 0.33) | 0.02 |
| Sitting | 0.21 | (0.16; 0.27) | < 0.01 | 0.13 | (0.07; 0.24) | < 0.01 | 0.10 | (0.02; 0.43) | 0.01 | 0.19 | (0.10; 0.34) | < 0.01 | 0.06 | (0.01; 0.35) | 0.01 |
| Lying | 0.22 | (0.17; 0.28) | < 0.01 | 0.23 | (0.16; 0.32) | < 0.01 | 0.30 | (0.16; 0.48) | 0.01 | 0.19 | (0.10; 0.34) | < 0.01 | 0.17 | (0.09; 0.32) | < 0.01 |
| Sitting + lying | 0.34 | (0.28; 0.40) | < 0.01 | 0.33 | (0.26; 0.41) | < 0.01 | 0.31 | (0.18; 0.49) | < 0.01 | 0.33 | (0.23; 0.44) | < 0.01 | 0.25 | (0.16; 0.38) | < 0.01 |
| Standing | 0.25 | (0.19; 0.31) | < 0.01 | 0.16 | (0.09; 0.27) | < 0.01 | 0.15 | (0.04; 0.40) | 0.20 | 0.24 | (0.16; 0.34) | < 0.01 | 0.16 | (0.07; 0.31) | 0.06 |
| Walking | 0.24 | (0.19; 0.30) | < 0.01 | 0.22 | (0.14; 0.31) | < 0.01 | 0.24 | (0.11; 0.44) | 0.01 | 0.39 | (0.29; 0.49) | < 0.01 | 0.12 | (0.04; 0.30) | < 0.01 |
| Running | 0.12 | (0.08; 0.18) | < 0.01 | 0.05 | (0.01; 0.24) | 0.12 | 0.15 | (0.04; 0.40) | 0.23 | 0.05 | (0.00; 0.42) | 0.40 | 0.08 | (0.02; 0.30) | 0.03 |
| Biking | 0.23 | (0.18; 0.29) | < 0.01 | 0.24 | (0.17; 0.33) | < 0.01 | 0.03 | – | – | 0.25 | (0.16; 0.39) | < 0.01 | 0.36 | (0.26; 0.47) | < 0.01 |
aAdjusted for sex, age, parental education, and sex*age
Significant p-values ≤0.05
ICC Intraclass correlation coefficient, CI Confidence interval, CPM Counts per minute, LPA Light physical activity, MPA Moderate physical activity, MVPA Moderate-to-vigorous physical activity, VPA Vigorous physical activity