Odds ratio (OR) and 95% confidence interval (CI) for dysmenorrhoea in association with self perceived stress during the preceding menstrual cycle in 388 Chinese women
| Stress in the preceding cycles | Total cycles† (% dysmenorrhoea) | OR‡ | 95% CI |
|---|---|---|---|
| **p<0.01. | |||
| †1160 cycles chosen from 388 subjects were included in this analysis. | |||
| ‡The outcome was defined as a binary variable adjusted for age, BMI, shift work, dust exposure, cycle length, education, and passive smoking. | |||
| §Reference group. | |||
| Low | 494 (21.9) | 1.0§ | – |
| Medium | 495 (28.7) | 1.2 | 0.8 to 1.7 |
| High | 171 (43.9) | 2.4 | 1.4 to 4.3** |