Table 1 Maternal characteristics and clinical features by HBsAg status among the participants
Characteristics | HBsAg + (n = 2050) | HBsAg - (n = 2050) | P-value |
|---|---|---|---|
Age (years, mean ± SD) | 29.0 ± 4.1 | 29.0 ± 4.1 | 1.000 |
Age < 30 | 1271(62.0) | 1271(62.0) | 1.000 |
Han nationality | 2040(99.5) | 2038(99.4) | 0.669 |
Education | < 0.001 | ||
Low educational level | 344(16.8) | 461(22.5) | |
High educational level | 1706(83.2) | 1589(77.5) | |
Pre-pregnancy BMI | 20.7 ± 2.6 | 20.9 ± 2.7 | 0.311 |
GWG | 16.6 ± 6.2 | 16.8 ± 7.6 | 0.363 |
History of pregnancy | |||
History of stillbirth | 6 (0.3) | 5 (0.2) | 0.763 |
History of miscarriage | 68(3.3) | 86(4.2) | 0.139 |
History of induced abortion | 324(15.8) | 357(17.4) | 0.166 |
First gestation | 1010 (49.3) | 1046(51.0) | 0.261 |
Nulliparous | 1616(78.8) | 1616(78.8) | 1.000 |
Preterm labor | 108(5.3) | 96(4.7) | 0.389 |