Unadjusted and adjusted odds ratios for maternal age at menarche and asthma
| Maternal age at menarche(years) | Unadjusted OR (95% CI)n = 7096 | Adjusted OR (95% CI)*n = 5103 |
|---|---|---|
| *Adjusted for sex, maternal education, maternal age at delivery, maternal allergy history, maternal smoking in pregnancy, maternal BMI (continuous), child birth weight (continuous), child BMI (continuous). | ||
| <12 | 1.00 (reference) | 1.00 (reference) |
| 12 | 0.78 (0.65 to 0.93) | 0.81 (0.65 to 1.01) |
| 13 | 0.89 (0.75 to 1.05) | 0.97 (0.79 to 1.19) |
| 14 | 0.78 (0.65 to 0.95) | 0.90 (0.72 to 1.14) |
| 15 | 0.83 (0.65 to 1.05) | 0.82 (0.61 to 1.11) |
| 16+ | 1.16 (0.88 to 1.52) | 1.41 (1.00 to 1.99) |
| p value | 0.011 | 0.026 |