Table 1

Mean birth weight-for-gestational-age z-scores and percent of mean live birth weight at very, moderate, late preterm, and term gestation, Swedish live births and stillbirths, 1992-2001
Mean birth weight-for-gestational-age z-score P-value
Live births (n=943,274) Stillbirths (n=3,096)
    Preterm
(n=46,531)
−0.29 −1.41 <0.001
Intrapartum Antepartum
−1.38 −1.41 0.249
 28-31 weeks (n=4,783) −0.96 −1.68 −1.87
 32-33 weeks (n=5,963) −0.60 −1.14 −1.41
 34-36 weeks (n=35,785) −0.16 −1.33 −1.01
    Term
(n=899,812)
+0.03 −0.55 <0.001
Intrapartum Antepartum
−0.05 −0.59 <0.001
Percent of mean live birth weight
    Preterm
100 (ref) 89.2 <0.001
Intrapartum Antepartum
89.0 88.9 0.283
 28-31 weeks 100 (ref) 90.8 87.9
 32-33 weeks 100 (ref) 92.3 89.3
 34-36 weeks 100 (ref) 86.2 89.6
    Term
100 (ref) 92.7 <0.001
Intrapartum Antepartum
98.9 92.2 <0.001

Zhang et al.

Zhang et al. BMC Pregnancy and Childbirth 2012 12:119   doi:10.1186/1471-2393-12-119

Open Data