Table 1.
The demographic feature of pregnant women with first-hand smoke (FHS) and second hand smoke (SHS) exposure in a rural area of Shanghai in 2018, China (n = 8586)
| Variables | Pregnant women (8586) | FHS exposure (81) | SHS exposure (1785) | |||
|---|---|---|---|---|---|---|
| n | Proportion (%) | n | Prevalence (%) | n | Prevalence (%) | |
| Age (years)†‡ | ||||||
| 19–25 | 237 | 2.76 | 6 | 2.53 | 62 | 26.16 |
| 26–30 | 2870 | 33.43 | 25 | 0.87 | 728 | 25.37 |
| 31–35 | 3858 | 44.93 | 29 | 0.75 | 730 | 18.92 |
| 36–48 | 1621 | 18.88 | 21 | 1.30 | 265 | 16.35 |
| BMI before the pregnancy ‡ | ||||||
| Less than 18.50 | 1819 | 21.19 | 18 | 0.99 | 390 | 21.44 |
| 18.50–23.99 | 5278 | 61.47 | 50 | 0.95 | 1054 | 19.97 |
| 24.00–27.00 | 526 | 6.13 | 4 | 0.76 | 103 | 19.58 |
| Over 27.00 | 963 | 11.22 | 9 | 0.93 | 238 | 24.71 |
| Education†‡ | ||||||
| Illiterate/Primary | 71 | 0.83 | 1 | 1.41 | 14 | 19.72 |
| Junior High | 795 | 9.26 | 14 | 1.76 | 181 | 22.77 |
| Senior High | 1613 | 18.79 | 25 | 1.55 | 373 | 23.12 |
| College and above | 6107 | 71.13 | 41 | 0.67 | 1217 | 19.93 |
| Family yearly income (CNY)‡ | ||||||
| Less than 50, 000 | 1344 | 15.65 | 15 | 1.12 | 334 | 24.85 |
| 50, 000–100, 000 | 1206 | 14.05 | 9 | 0.75 | 273 | 22.64 |
| 100, 001–150, 000 | 1117 | 13.01 | 12 | 1.07 | 239 | 21.40 |
| 150, 001–300, 000 | 1169 | 13.62 | 11 | 0.94 | 204 | 17.45 |
| Over 300, 000 | 3750 | 43.68 | 34 | 0.91 | 735 | 19.60 |
| Residency status†‡ | ||||||
| Local resident | 4545 | 52.94 | 56 | 1.23 | 1094 | 24.07 |
| Non-local resident | 4041 | 47.06 | 25 | 0.62 | 691 | 17.10 |
| Gestational diabetes mellitus (GDM)†‡ | ||||||
| Yes | 533 | 6.21 | 10 | 1.88 | 144 | 27.02 |
| No | 8053 | 93.79 | 71 | 0.88 | 1641 | 20.38 |
†the differences between group on prevalence of prenatal first-hand smoke exposure was statistically significant (P < 0.01)
‡the differences between group on prevalence of prenatal second-hand smoke exposure was statistically significant (P < 0.01)