Table 1.
Comparison of socioeconomic characteristics between children with and without maternal prenatal exposure to ETS (environmental tobacco smoke).
| Variables | Prenatal Exposure to ETS? | p-Value | ||
|---|---|---|---|---|
| No (n = 176) | Yes (n = 270) | |||
| Sex | Boy | 105 (59.7) | 152 (56.3) | 0.48 |
| Girl | 71 (40.3) | 118 (43.7) | ||
| Age of child in month (Mean ± SD) | 14.8 ± 5.6 | 14.5 ± 5.4 | 0.59 | |
| Low birth weight | No | 160 (91.9) | 254 (94.1) | 0.39 |
| Yes | 14 (8.1) | 16 (5.9) | ||
| Age of mother in year (Mean ± SD) | 24.7 ± 5.6 | 24.5 ± 4.9 | 0.60 | |
| Education of mother | ≤9 years | 151 (85.8) | 242 (89.6) | 0.22 |
| >9 years | 25 (14.2) | 28 (10.4) | ||
| Is mother primary caregiver | No | 90 (51.7) | 132 (48.9) | 0.56 |
| Yes | 84 (48.3) | 138 (51.1) | ||
| Family income in the last year (RMB) | ≤25,000 Yuan | 71 (40.6) | 107 (39.6) | 0.84 |
| >25,000 Yuan | 104 (59.4) | 163 (60.4) | ||
SD, Standard deviation; numbers in parenthesis are percentages for categorical variables.