Table 4.
Fertility outcome by MC characteristics (n = 2109)
| Item | Achieve conception [n (%)] |
Crude FOR (95% CI) |
adj. FOR (95% CI) a |
P value (wald's test) |
P value (LR-test) |
|
|---|---|---|---|---|---|---|
| Menstrual Cycle Length | < 0.001 | |||||
| Regular | 359 (69.57) | 1 | 1 | |||
| Short | 212 (66.67) | 0.85 (0.62, 1.15) | 0.81 (0.6, 1.11) | 0.2 | ||
| Long | 483 (69.00) | 0.97 (0.75, 1.25) | 0.92 (0.71, 1.2) | 0.56 | ||
| Irregular | 340 (59.13) | 0.63 (0.49, 0.82) | 0.59 (0.45, 0.77) | < 0.001 | ||
| Menstrual Blood Color | 0.11 | |||||
| Dark Red | 503 (68.44) | 1 | 1 | |||
| Bright Red | 735 (64.25) | 0.82 (0.67, 1) | 0.79 (0.63, 0.98) | 0.04 | ||
| Light Red | 49 (65.33) | 0.86 (0.52, 1.44) | 0.87 (0.52, 1.47) | 0.61 | ||
| Unknown | 107 (69.03) | 1.05 (0.71, 1.56) | 1.13 (0.76, 1.68) | 0.55 | ||
| Blood Clots, Y | 759 (35.99) | 1.08 (0.89, 1.3) | 1.02 (0.83, 1.25) | 0.88 | 0.88 |
Notes: aAdjusted for age (≤ 25, 25-30, 30-35, 35-45), education level (high school or less, bachelor, master/doctor), age at menarche (continuous variable), and abortion history (0, 1-2, ≥ 3 times). Adj: adjusted; MC: menstrual cycle; FOR: fecundability odds ratio; LR-test: likelihood ratio test.