TABLE 2

Child Characteristics by Gestational Age Groups

Mean, SD or Weighted %
AllLate Preterm (34–36 wk)Early Term (37–38 wk)Term (39–41 wk)P*
Weighted percentage9.128.862.1
Gender, male50.549.550.950.5.84
Birth weight, g3359.2, 497.82873.5, 859.03247.8, 618.63481.7, 414.4<.0001
Fetal growth
 Intrauterine growth restriction (<10%, small for gestational age)10.410.09.810.8.57
 5-Minute Apgar >797.793.297.998.2<.0001
Days of hospitalization<.0001
 0–1 d91.770.792.994.2
 2–7 d5.914.95.24.9
 8–14 d1.58.01.60.6
 15–30 d0.75.40.30.3
 >30 d0.21.10.10.07
Received early intervention (yes)
 9 mo1.63.91.91.1.0001
 24 mo2.23.02.51.9.24
Age at assessment, mo
 Preschool51.9, 5.152.0, 4.451.8, 5.251.9, 4.0.39
 Kindergarten65.3, 3.665.5, 4.765.2, 4.165.3, 3.0.20
Month of assessment, preschool.38
 August–October64.462.063.465.1
 November–January23.125.822.622.9
 February–June12.612.113.912.0
Month of kindergarten at assessment.32
 August–October39.936.737.541.6
 November–January50.452.554.048.4
 February–June9.710.88.510.0
  • * P value was derived based on analysis of variance for continuous measures and χ2 test for categorical data.