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Table 3 Generalized estimating equations model accounting for variance in bone mass, lean mass, and fat mass.

From: Trait-specific tracking and determinants of body composition: a 7-year follow-up study of pubertal growth in girls

Dependent variable Predictors* R 2 Main effect p-value
Bone mass Body size index 0.62 < 0.001
  Mother's BM 0.09 < 0.001
  Diet index 0.09 0.019
  Breast feeding 0.06 0.004
  Birth size index -0.03 0.043
Lean mass Body size index 0.59 < 0.001
  Diet index 0.24 < 0.001
  LTPA score 0.14 < 0.001
Fat mass Body size index 0.78 < 0.001
  Diet index 0.25 < 0.001
  LTPA score 0.12 < 0.001
  Parent's education -0.04 0.036
  1. *The predictors finally entered into the model included assessment times, intervention, age at menarche, birth size index, body size, duration of breast feeding months, LTPA score, diet index, parent's education, and mother's FM, LM, and BM, respectively. Only the significant predictors in the model are shown in the table.
  2. †The R 2 values for the diet and body size indexes (clusters) are absolute values.
  3. As it is common to have measures of individual nutrients available rather than their combination, we report also the β values for each nutrient in the diet index: BM (β protein = 0.039, Ca = 0.077, Mg = 0.003, K = 0.042, and P = -0.26), LM (β protein = 0.811, Ca = 0.959, Mg = 2.824, K = -0.638, and P = -6.316), and FM (β protein = -1.101, Ca = -1.350, Mg = -2.677, K = 0.615, and P = 7.844). Respectively, for body size index they were: BM (β height = 0.017 and weight = 0.022), LM (β height = 0.395 and weight = 0.181), FM (β height = -0.406 and weight = 0.788).