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
 Intercept18.1 (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)
 Wave0.22 (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
 Intercept18.7 (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)
 Wave0.21 (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
 Intercept18.6 (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)
 Wave0.21 (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
 Intercept18.3 (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)
 Wave0.23 (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
 Intercept18.1 (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)
 Wave0.24 (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.