Table 2.
Quantile regression models of MVPA and change in FMI percentiles from ages 7 to 15 years
| FMI | |||||
|---|---|---|---|---|---|
| 10th percentile | 25th percentile | 50th percentile | 75th percentile | 90th percentile | |
| Model 1 | |||||
| Intercept | 2.97 (2.55, 3.39) | 3.76 (3.32, 4.21) | 5.10 (4.58, 5.61) | 6.57 (5.84, 7.31) | 8.84 (7.47, 10.21) |
| Time | −0.05 (−0.11, 0.01) | 0.07 (0.02, 0.11) | 0.19 (0.13, 0.25) | 0.41 (0.33, 0.49) | 0.56 (0.42, 0.69) |
| MVPA | −0.66 (−1.03, −0.28) | −0.77 (−1.10, −0.45) | −1.19 (−1.53, −0.84) | −1.47 (−1.99, −0.94) | −2.15 (−3.07, −1.22) |
| Model 2 | |||||
| Intercept | 4.73 (2.97, 6.48) | 3.70 (2.57, 4.84) | 4.94 (3.34, 6.54) | 6.15 (3.42, 8.88) | 11.59 (7.47, 15.71) |
| Time | −0.03 (−0.12, 0.06) | 0.10 (0.04, 0.16) | 0.25 (0.16, 0.34) | 0.47 (0.34, 0.60) | 0.66 (0.49, 0.82) |
| MVPA | −0.35 (−0.87, 0.18) | −0.56 (−1.04, −0.07) | −1.46 (−2.04, −0.88) | −2.11 (−3.00, −1.21) | −2.69 (−3.92, −1.46) |
Boldface indicates statistical significance (p < 0.05); MVPA, hours of moderate-to-vigorous physical activity per day. Model 1: describes changes of FMI over time with inclusion of MVPA as independent variable. Model 2: as Model 1 with inclusion of wear time, sedentary behavior, towns quintile and sex as covariates. Data presented are coefficients (95% confidence intervals). Time is coded 0, 2, 5, and 8 for age 7, 9, 12, and 15 years, respectively. The MVPA coefficients are the changes in FMI, at each percentile, for every additional hour spent in MVPA