Table 3.
Physiological factors associated with primary infertility
| Physiological factors | Infertile women (n=51), n (%) | Normal women (n=519), n (%) | χ2 | P | OR | CI (at 95% confidence limit) |
|---|---|---|---|---|---|---|
| BMI | ||||||
| Obese and preobese | 30 (11.8) | 224 (88.2) | 4.61 | 0.03 | 1.88 | 1.049-3.374 |
| Normal and underweight | 21 (6.6) | 295 (94.4) | ||||
| Age at menarche | ||||||
| >14 | 35 (18.1) | 158 (81.9) | 30.23 | 0.0001 | 4.99 | 2.688-9.294 |
| <14 | 16 (4.3) | 361 (95.7) | ||||
| Menstruation pattern | ||||||
| Irregular | 29 (14.1) | 177 (85.9) | 10.42 | 0.001 | 2.54 | 1.422-4.563 |
| Regular | 22 (6.0) | 342 (94.0) |
OR: Odds ratio, CI: Confidence interval, BMI: Body mass index