Table 5 Predictors of BMI trajectory characteristics, from multivariable linear regression models that include all covariates in the table
| Â | Â | Mean difference in the BMI trajectory characteristic (95% confidence interval) | ||||||
|---|---|---|---|---|---|---|---|---|
| Â | Â | Girls(vs boys) | Race/ethnicity (vs white) | Year of birth (vs 1979 ~ 1984) | Z-score of birth weight | Medicaid (vs non-Medicaid) | ||
BMI trajectory characteristics | na | Â | Black | Other | 1985 ~ 1989 | 1990 ~ 1994 | Â | Â |
1 week to infancy peak | Â | Â | Â | Â | Â | Â | Â | Â |
Age at infancy peak, months | 2128 | 0.2 (0.2, 0.3) | -0.1 (-0.2, 0.1) | -0.1 (-0.3, 0.0) | 0.0 (-0.2, 0.1) | 0.0 (-0.1, 0.2) | 0.0 (0.0, 0.1) | 0.1 (-0.1, 0.4) |
BMI at infancy peak, kg/m2 | 2128 | -0.5 (-0.6, -0.4) | 0.0 (-0.2, 0.1) | 0.0 (-0.1, 0.2) | 0.2 (0.0, 0.3) | 0.1 (0.0, 0.3) | 0.2 (0.2, 0.3) | 0.1 (-0.1, 0.3) |
Change in BMI, kg/m2 | 2128 | -2.2 (-2.6, -1.7) | -0.1 (-0.9, 0.6) | 0.3 (-0.5, 1.0) | 0.7 (0.1, 1.4) | 0.2 (-0.5, 0.9) | -1.4 (-1.7, -1.2) | -0.3 (-1.4, 0.8) |
Velocity, 10-2 kg/m2/month | 2128 | -35.4 (-41.7, -29.1) | -0.5 (-12.6, 11.5) | 7.1 (-4.9, 19.1) | 12.9 (2.7, 23.2) | 3.1 (-7.1, 13.2) | -21.4 (-24.6, -18.2) | -7.1 (-23.8, 9.5) |
Area under curve (kg/m2-months) | 2128 | 1 (0, 3) | 0 (-3, 3) | -2 (-5, 1) | 1 (-2, 3) | 2 (-1, 4) | 3 (2, 3) | 3 (-1, 7) |
Infancy peak to adiposity rebound | Â | Â | Â | Â | Â | Â | Â | Â |
Age at adiposity rebound, months | 2063 | -2.1 (-3.0, -1.1) | -3.3 (-5.3, -1.3) | -1.6 (-3.5, 0.3) | 0.1 (-1.5, 1.6) | -0.2 (-1.8, 1.4) | -0.6 (-1.1, -0.1) | -1.9 (-4.5, 0.8) |
BMI at adiposity rebound, kg/m2 | 2063 | -0.1 (-0.2, 0.0) | 0.2 (0.0, 0.4) | 0.0 (-0.2, 0.2) | 0.2 (0.0, 0.3) | 0.2 (0.0, 0.3) | 0.3 (0.3, 0.4) | 0.3 (0.0, 0.6) |
Age difference, months | 2063 | -2.3 (-3.3, -1.3) | -3.2 (-5.2, -1.2) | -1.4 (-3.4, 0.5) | 0.1 (-1.5, 1.7) | -0.2 (-1.8, 1.4) | -0.6 (-1.1, -0.1) | -2.0 (-4.7, 0.7) |
Change in BMI, kg/m2 | 2063 | 0.3 (0.3, 0.4) | 0.2 (0.0, 0.3) | 0.0 (-0.1, 0.2) | 0.0 (-0.1, 0.1) | 0.0 (-0.1, 0.1) | 0.1 (0.0, 0.1) | 0.2 (0.0, 0.4) |
Velocity, 10-2 kg/m2/month | 2063 | 0.6 (0.5, 0.7) | 0.1 (-0.1, 0.2) | -0.1 (-0.2, 0.1) | 0.0 (-0.2, 0.1) | 0.0 (-0.1, 0.2) | 0.1 (0.0, 0.1) | 0.2 (0.0, 0.4) |
Area under curve (kg/m2-months) | 2063 | -46 (-61, -31) | -48 (-78, -18) | -25 (-53, 4) | 7 (-17, 31) | 1 (-23, 25) | 1 (-7, 9) | -24 (-65, 16) |
Adiposity rebound to age 18 years | Â | Â | Â | Â | Â | Â | Â | Â |
Change in BMI, kg/m2 | 2063 | -0.3 (-0.5, 0.0) | 0.9 (0.4, 1.4) | 0.4 (0.0, 0.9) | 0.1 (-0.3, 0.5) | 0.1 (-0.3, 0.5) | 0.1 (0.0, 0.2) | 0.4 (-0.2, 1.1) |
Velocity, 10-2 kg/m2/month | 2063 | -0.1 (-0.1, 0.0) | 0.3 (0.1, 0.4) | 0.1 (0.0, 0.3) | 0.0 (-0.1, 0.1) | 0.0 (-0.1, 0.1) | 0.0 (0.0, 0.1) | 0.1 (-0.1, 0.3) |
Area under curve (kg/m2-months) | 2063 | -6 (-55, 42) | 162 (65, 258) | 70 (-23, 163) | 32 (-47, 110) | 44 (-34, 121) | 70 (45, 94) | 115 (-15, 246) |