Table 4

 Linear regression coefficients for weight gains and BMI z score at age 7

Models*Birth weight (z score)regression coefficient(95% CI)Early weight gain(z score) regression coefficient (95% CI)Late weight gain(z score) regression coefficient (95% CI)R2
*Models: univariable models include only one of the three variables, that is, birth weight, early or late weight gain z scores; bivariable models: model 1 includes birth weight and early weight gain z scores, model 2 includes early and late weight gain z scores, and model 3 includes birth weight and late weight gain z scores; multivariable model includes all three variables in the model, that is, birth weight, and early and late weight gain z scores. Early weight gain: change in z score for weight between birth and 6 weeks; late weight gain: change in z score for weight between 6 weeks and 18 months.
Univariable models0.16 (0.11 to 0.22)0.02
0.11 (0.06 to 0.16)0.01
0.16 (0.12 to 0.20)0.04
Bivariable models
    Model 10.22 (0.16 to 0.28)0.17 (0.12 to 0.22)0.05
    Model 20.20 (0.14 to 0.25)0.21 (0.17 to 0.25)0.08
    Model 30.20 (0.14 to 0.25)0.18 (0.14 to 0.22)0.08
Multivariable model0.32 (0.27 to 0.38)0.31 (0.26 to 0.37)0.28 (0.23 to 0.32)0.16