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Table 5 Predictors of BMI trajectory characteristics, from multivariable linear regression models that include all covariates in the table

From: Childhood body mass index trajectories: modeling, characterizing, pairwise correlations and socio-demographic predictors of trajectory characteristics

   Mean difference in the BMI trajectory characteristic (95% confidence interval)
   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   Black Other 1985 ~ 1989 1990 ~ 1994   
1 week to infancy peak         
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         
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         
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)
  1. a Sample size reduced due to missing data on race/ethnicity (15.3%) and birth weight (22.7%)