Table 3

 Linear regression coefficients for body weights and BMI z scores at age 7

Models*Birth weight (z score)regression coefficient(95% CI)6 week weight (z score)regression coefficient(95% CI)18 month weight (z score)regression coefficient(95% CI)R2
*Models: univariable models include only one of the three variables, that is, birth weight, 6 week, or 18 month weight z scores; bivariable models: model 1 includes birth weight and 6 week weight z scores, model 2 includes 6 week weight and 18 month weight z scores, and model 3 includes birth weight and 18 month weight z scores; multivariable model includes all three variables in the model, that is, birth weight, 6 week, and 18 month weight z scores.
Univariable models0.16 (0.11 to 0.22)0.02
0.19 (0.15 to 0.24)0.05
0.29 (0.26 to 0.33)0.16
Bivariable models
    Model 10.05 (−0.02 to 0.11)0.17 (0.12 to 0.22)0.05
    Model 20.04 (−0.01 to 0.09)0.28 (0.24 to 0.32)0.16
    Model 30.03 (−0.02 to 0.08)0.29 (0.25 to 0.32)0.16
Multivariable model0.01 (−0.05 to 0.07)0.03 (−0.02 to 0.09)0.28 (0.23 to 0.32)0.16