TABLE 2.
Changes in the BMI Distribution From Age 14 to 18 and the Influence of Sleep
| BMI percentile | |||||
|---|---|---|---|---|---|
| 10th | 25th | 50th | 75th | 90th | |
| Model 1a | |||||
| Intercept | 18.1 (17.8, 18.4) | 19.6 (19.4, 19.8) | 21.5 (21.2, 21.8) | 24.2 (23.7, 24.7) | 27.8 (27.1, 28.6) |
| Wave | 0.22 (0.19, 0.26) | 0.22 (0.19, 0.25) | 0.24 (0.21, 0.28) | 0.24 (0.17, 0.30) | 0.35 (0.25, 0.44) |
| Model 2a | |||||
| Intercept | 18.7 (18.1, 19.4) | 20.6 (20.0, 21.3) | 22.8 (22.0, 23.6) | 26.4 (25.3, 27.5) | 30.3 (28.5, 32.1) |
| Wave | 0.21 (0.18, 0.25) | 0.21 (0.18, 0.24) | 0.23 (0.20, 0.27) | 0.21 (0.15, 0.27) | 0.28 (0.19, 0.38) |
| Sleep | −0.07 (–0.14, 0.01) | −0.13 (–0.21, –0.05) | −0.17 (–0.26, –0.07) | −0.26 (–0.39, –0.14) | −0.28 (–0.48, –0.08) |
| Model 3b | |||||
| Intercept | 18.6 (18.0, 19.3) | 20.6 (19.9, 21.3) | 22.5 (21.7, 23.3) | 25.9 (24.7, 27.0) | 29.9 (28.0, 31.7) |
| Wave | 0.21 (0.18, 0.25) | 0.21 (0.18, 0.23) | 0.24 (0.20, 0.27) | 0.21 (0.16, 0.27) | 0.28 (0.18, 0.38) |
| Sleep | −0.06 (–0.13, 0.01) | −0.12 (–0.21, –0.04) | −0.15 (–0.24, –0.06) | −0.25 (–0.38, –0.12) | −0.24 (–0.44, –0.05) |
| Model 4c | |||||
| Intercept | 18.3 (17.6, 19.1) | 20.5 (19.8, 21.2) | 22.3 (21.4, 23.2) | 25.8 (24.7, 27.0) | 30.4 (28.5, 32.2) |
| Wave | 0.23 (0.19, 0.27) | 0.22 (0.19, 0.25) | 0.24 (0.21, 0.28) | 0.22 (0.17, 0.28) | 0.27 (0.17, 0.36) |
| Sleep | −0.05 (–0.13, 0.03) | −0.13 (–0.21, –0.05) | −0.15 (–0.25, –0.06) | −0.23 (–0.34, –0.11) | −0.23 (–0.41, –0.05) |
| Model 5d | |||||
| Intercept | 18.1 (17.4, 18.9) | 20.3 (19.5, 21.0) | 21.8 (20.9, 22.6) | 24.9 (23.6, 26.3) | 28.8 (27.0, 30.5) |
| Wave | 0.24 (0.20, 0.27) | 0.22 (0.19, 0.25) | 0.25 (0.22, 0.28) | 0.24 (0.18, 0.30) | 0.30 (0.20, 0.40) |
| Sleep | −0.04 (–0.11, 0.03) | −0.12 (–0.20, –0.04) | −0.15 (–0.24, –0.06) | −0.25 (–0.38, –0.12) | −0.27 (–0.45, –0.09) |
Data presented are coefficients and 95% CIs in parentheses. Wave is coded 0, 1, 2, 3, 4, 5, 6, and 7 to represent each 6-month follow-up, and thus the wave coefficients are interpreted as change in BMI per 6 months. Sleep is modeled in hours per day, and thus the sleep coefficients are interpreted as the change in BMI for each additional hour spent sleeping.
a
Adjusted for gender.
b
Adjusted for gender, race, and maternal education.
c
Adjusted for gender, race, maternal education, and MVPA.
d
Adjusted for gender, race, maternal education, MVPA, and screen time.