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. Author manuscript; available in PMC: 2019 Sep 1.
Published in final edited form as: J Pediatr. 2018 May 21;200:132–139.e3. doi: 10.1016/j.jpeds.2018.04.073

Table 2.

Child growth characteristics at 36 weeks and 18 months corrected age

Characteristic Normal/Underweight BMI< 85 Percentile Overweight/Obese BMI ≥ 85 Percentile P value
N=302 N=86
Weight
 Weight at 36 weeks (kg) 2.1 ± 0.4 2.2 ± 0.4 .041
 Weight % at 36 weeks 10.8 ± 15 14.8 ± 18 .046
 Weight z score at 36 weeks −1.7 ± 1 −1.4 ± 1 .041
 Weight at 18 months (kg) 10.5 ± 1 12.3 ± 2 < .001
 Weight % at 18 months 16.7 ± 21 49.7 ± 32 < .001
 Weight z score at 18 months −1.6 ± 1 0.0 ± 1 < .001
Height
 Height at 18 months (cm) 81.0 ± 4 83.0 ± 4 < .001
 Height % at 18 months 20.6 ± 22 36.0 ± 28 < .001
 Height z score at 18 months −1.2 ± 1 −0.5 ± 1 < .001
Weight gain velocities
 Birth- 36 weeks (g/w) 133.8 ± 32 143.2 ± 38 .032
 Time birth wt regained to 36 weeks (g/w) 166.7 ± 47 178.5 ± 49 .063
 36 weeks to 18-22 months (kg/yr) 8.0 ± 2 9.9 ± 2 < .001
 18-22months to 6-7 years (kg/yr) 2.3 ± .5 3.8 ± .9 < .001

Note: mean ± SD