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Table 1 Maternal and neonatal characteristics for HBsAg status

From: Association between maternal hepatitis B virus carrier and gestational diabetes mellitus: a retrospective cohort analysis

  HBsAg positive (N = 3039) HBsAg negative (N = 36,500) P value
Maternal characteristics
Age (years) 30.23 ± 4.60 29.53 ± 4.38 < 0.05
 < 35 2473 (81.4%) 31,460 (86.2%) < 0.05
 ≥ 35 566 (18.6%) 5040 (13.8%) 0.12
Gravidity 2.08 ± 1.25 1.82 ± 1.07 < 0.05
Parity 0.50 ± 0.61 0.36 ± 0.51 < 0.05
Multipara 1695 (55.8%) 24,032 (65.8%) 0.24
Gestational age (weeks) 38.27 ± 2.19 38.55 ± 2.17 < 0.05
Pre-pregnancy weight (kg) 56.70 ± 8.91 56.33 ± 8.76 0.76
Pre-pregnancy body mass index (kg/m2) 22.31 ± 3.32 22.17 ± 3.55 0.56
Underweight (< 18.5) 168 (5.5%) 3725 (10.2%) 0.97
Normal weight (18.5 ~ 23.9) 2323 (76.4%) 22,517 (61.7%) < 0.05
Overweight (24 ~ 27.9) 386 (12.7%) 8383 (23.0%) 0.10
Obesity (≥ 28) 162 (5.4%) 1875 (5.1%) 0.54
Smoking during pregnancy 21 (0.7%) 219 (0.6%) 0.75
Alcohol drinking during pregnancy 36 (1.2%) 547 (1.5%) 0.81
Neonatal characteristics
Birthweight (g) 3086.50 ± 557.18 3122.96 ± 531.07 0.06
Apgar score (1 min) 9.66 ± 1.25 9.70 ± 1.23 0.41
Apgar score (5 min) 9.84 ± 1.08 9.85 ± 1.08 0.25
Apgar score (10 min) 9.88 ± 1.03 9.87 ± 1.07 0.63
Male infants 1773 (58.3%) 16,712 (45.8%) < 0.05