Table 2 The birth weight, birth week and gender of children with their mothers prenatally exposed to FHS (first hand smoke) and SHS (second hand smoke) in a rural area of Shanghai in the year of 2018, China
Variables for the children | Total condition | Mother with prenatal FHS exposure | Mother with prenatal SHS exposure | ||
|---|---|---|---|---|---|
Yes (n = 81) | No (n = 8505) | Yes (n = 1785) | No (n = 6801) | ||
Birth weight (g), mean (SD)†‡ | 3315.52 (497.16) | 3149.38 (481.03) | 3317.10 (497.08) | 3263.18 (479.23) | 3329.25 (500.89) |
Birth weight (g), median (IQR)†‡ | 3350 (3000–3650) | 3150 (2950–3500) | 3350 (3000–3650) | 3300 (3000–3570) | 3350 (3000–3650) |
Birth weight, n (%)†‡ | |||||
<2500 g | 403 (4.69) | 10 (12.35) | 393 (4.62) | 149 (8.35) | 254 (3.73) |
≥ 2500 g | 8183 (95.31) | 71 (87.65) | 8112 (95.38) | 1636 (91.65) | 6547 (96.27) |
Birth week, mean (SD) | 38.61 (2.39) | 38.77 (2.43) | 38.61 (2.39) | 38.62 (2.06) | 38.61 (2.47) |
Birth week, median (IQR) | 39 (38–40) | 39 (38–40) | 39 (38–40) | 39 (38–40) | 39 (38–40) |
Birth week, n (%) | |||||
<37 weeks | 850 (9.90) | 9 (11.11) | 841 (9.89) | 174 (9.75) | 676 (9.94) |
≥ 37 weeks | 7736 (90.10) | 72 (88.89) | 7664 (90.11) | 1611 (90.25) | 6125 (90.06) |
Gender of the children | |||||
boy | 4595 (53.52) | 41 (50.62) | 4554 (53.54) | 931 (52.16) | 3664 (53.87) |
girl | 3991 (46.48) | 40 (49.38) | 3951 (46.46) | 854 (47.84) | 3137 (46.13) |