Table 1.
Comparison of perinatal and demographic birth data between genders from total live births in 2010 from Huai’an, Jiangsu, China.
| Variables | Male | Female | Total births | p Values |
|---|---|---|---|---|
| N (%) | 32 406 (53.8) | 27 874 (46.2) | 60 280 (100%) | |
| GA, mean ± SD (week) | 39.6 ± 1.5 | 39.7 ± 1.5 | 39.6 ± 1.5 | <0.001 |
| Preterm birth rate | 1240 (3.85) | 979 (3.53) | 2219 (3.70) | 0.020 |
| <32 weeks | 164 (0.51) | 135 (0.49) | 299 (0.50) | 0.370 |
| <28 weeks | 15 (0.05) | 17 (0.06) | 32 (0.05) | 0.273 |
| BW, mean ± SD (g) | 3494 ± 496 | 3378 ± 477 | 3440 ± 491 | <0.001 |
| LBW | 835 (2.58) | 843 (3.03) | 1678 (2.79) | <0.001 |
| VLBW | 73 (0.23) | 79 (0.28) | 152 (0.25) | 0.090 |
| ELBW | 13 (0.04) | 15 (0.05) | 28 (0.05) | 0.277 |
| Macrosomia | 5343 (16.5) | 2842 (10.2) | 8185 (13.6) | <0.001 |
| Multi-birth rate | 541 (1.67) | 541 (1.94) | 1082 (1.80) | 0.007 |
| Cesarean section | 17 640 (54.6) | 14 174 (51.0) | 31 814 (52.9) | <0.001 |
| Pregnant complications | 3205 (9.89) | 2805 (10.1) | 6010 (10.0) | 0.255 |
| Pregnant hypertension | 523 (1.61) | 489 (1.75) | 1012 (1.68) | 0.096 |
| PROM | 1742 (5.38) | 1522 (5.46) | 3264 (5.41) | 0.330 |
| Pregnant anemia | 392 (1.21) | 352 (1.26) | 744 (1.23) | 0.290 |
| Maternal age, mean ± SD (y) | 26.0 ± 5.2 | 25.8 ± 5.1 | 25.9 ± 5.1 | <0.001 |
| Amniotic fluid volume | 0.240 | |||
| Normal | 29 390 (92.7) | 25 209 (92.4) | 54 599 (92.6) | |
| Polyhydramnios | 253 (0.80) | 217 (0.80) | 470 (0.80) | |
| Oligohydramnios | 2047 (6.46) | 1857 (6.81) | 3904 (6.62) | |
| Amniotic fluid contamination | 0.220 | |||
| Normal | 27 613 (86.0) | 23 667 (85.6) | 51 280 (85.8) | |
| Grade I | 1739 (5.42) | 1476 (5.34) | 3215 (5.38) | |
| Grade II | 1424 (4.44) | 1306 (4.72) | 2730 (4.57) | |
| Grade III | 1327 (4.13) | 1195 (4.32) | 2522 (4.22) | |
| 1-min Apgar ≤7 | 1256 (3.90) | 1023 (3.68) | 2279 (3.80) | 0.092 |
| 1-min Apgar ≤3 | 191 (0.59) | 155 (0.56) | 346 (0.58) | 0.309 |
| 5-min Apgar ≤7 | 305 (0.94) | 231 (0.83) | 536 (0.90) | 0.075 |
| 5-min Apgar ≤3 | 117 (0.36) | 116 (0.42) | 233 (0.39) | 0.156 |
| Congenital anomalies | 236 (0.73) | 175 (0.63) | 411 (0.68) | 0.074 |
| Mortality rate# | 124 (0.38) | 123 (0.44) | 247 (0.41) | 0.145 |
| Preterm death rate | 79 (6.43) | 87 (8.94) | 166 (7.61) | <0.001 |
| Hospitalized rate | 4332 (13.4) | 2540 (9.11) | 6872 (11.3) | <0.001 |
Abbreviations: BW, birth weight; LBW, Low BW; VLBW: Very LBW; ELBW: Extremely LBW; PROM, premature rupture of membrane. Statistics: Values are n (%) or mean ± SD; p values are for comparison between corresponding male and female value sets. #Data obtained in the first 7 days after birth.