Table 1.
Characteristics of the 371 newly married young women by status of any ETS exposure, Anqing, China (mean ± SD or %).
| Characteristic | Nonexposed (n = 25) | ETS exposed (n = 346) | p-Value |
|---|---|---|---|
| Age (years) | 25.1 ± 1.8 | 24.9 ± 1.6 | 0.450a |
| Height (m) | 1.6 ± 0.1 | 1.6 ± 0.1 | 0.481a |
| Weight (kg) | 48.1 ± 6.3 | 49.3 ± 5.8 | 0.320a |
| BMI (kg/m2) | 19.6 ± 2.1 | 19.8 ± 2.1 | 0.565a |
| Age at menarche (years) | 14.5 ± 1.5 | 14.7 ± 1.4 | 0.562a |
| Cycle length (days) | 30.0 ± 7.3 | 30.8 ± 5.4 | 0.547a |
| Follicular phase (days) | 13.8 ± 6.6 | 15.9 ± 5.4 | 0.139a |
| Luteal phase (days) | 16.2 ± 3.9 | 15.0 ± 3.1 | 0.118a |
| Shift work | 96.0 | 95.7 | 0.936b |
| Education | 0.177b | ||
| Middle school | 60.0 | 63.1 | |
| ≥High school | 40.0 | 37.9 | |
| Dust exposure | 0.489b | ||
| Low | 28.0 | 33.9 | |
| Moderate | 28.0 | 36.8 | |
| Heavy | 44.0 | 29.3 | |
| Noise exposure | 0.665b | ||
| Low | 24.0 | 26.6 | |
| Moderate | 36.0 | 35.7 | |
| Heavy | 40.0 | 37.7 | |
| Perceived stress | 0.224b | ||
| Low | 68.0 | 63.2 | |
| Moderate or high | 32.0 | 36.8 | |
| Previous contraception | 0.290b | ||
| Condom | 43.5 | 29.8 | |
| Intrauterine device | 0 | 4.0 | |
| Pill | 0 | 0.9 | |
| Others | 21.7 | 15.5 | |
| No contraception | 34.8 | 49.8 | |
| ETS exposure | |||
| At home only | 70.8 | ||
| At work only | 2.0 | ||
| Both at work and at home | 27.2 |
a
t-Test.
b
Chi-square test.