| Heating season (n,%;mean ± SD) | Non-heating season (n,%;mean ± SD) | P |
---|---|---|---|
Maternal Age(year) | Â | Â | 0.285 |
15- | 7(7.00) | 12(12.00) | Â |
25- | 89(89.00) | 81(81.00) | |
35–44 | 4(4.00) | 7(7.00) | |
Gestation length (day) | 275.06 ± 0.716 | 276.82 ± 0.654 | > 0.05 |
Nationality | Â | Â | 0.188 |
Han | 95(95.00) | 85(85.00) | Â |
Minority | 5(5.00) | 15(15.00) | |
AQI | 106.91 ± 0.13 | 97.44 ± 0.95 | < 0.001* |
PM2.5(µg·m− 3) | 65.72 ± 0.15 | 57.28 ± 0.92 | < 0.001* |
PM10(µg·m− 3) | 116.91 ± 0.15 | 98.88 ± 1.49 | < 0.001* |
SO2(µg·m− 3) | 9.03 ± 0.01 | 7.87 ± 0.03 | < 0.001* |
NO2(µg·m− 3) | 46.37 ± 0.06 | 42.22 ± 0.33 | < 0.001* |
CO(µg·m− 3) | 1.29 ± 0.01 | 1.14 ± 0.01 | < 0.001* |
O3(µg·m− 3) | 46.94 ± 0.15 | 53.36 ± 0.75 | < 0.001* |
PAH(µg·L− 1) |  |  |  |
Maternal PAHs | 17.57 ± 4.53 | 14.50 ± 4.65 | < 0.001* |
Newborn PAHs | 14.10 ± 3.23 | 11.48 ± 3.28 | < 0.001* |
Concentration of 8-OHdG(mg·moL− 1) |  |  |  |
8-OHdG in maternal venous blood | 2532.71 ± 299.19 | 2399.04 ± 284.18 | 0.001* |
8-OHdG in maternal urine | 1454.58 ± 306.15 | 600.32 ± 202.89 | < 0.001* |
8-OHdG in neonatal umbilical cord blood | 2434.88 ± 299.89 | 1288.58 ± 766.93 | < 0.001* |