Table 4 Multivariable logistic regression analysis predicting risk factors for infertility
All couples | First child | Second child | ||||
|---|---|---|---|---|---|---|
AOR [95% CI] | P value | AOR [95% CI] | P value | AOR [95% CI] | P value | |
Age, years, women | ||||||
20–24 | Reference | 0.008 | Reference | < 0.001 | Reference | 0.040 |
25–29 | 1.41 [0.64, 3.09] | 1.23 [0.67, 2.12] | 1.02 [0.57, 1.86] | |||
30–34 | 1.96 [0.89, 4.32] | 1.54 [0.87, 3.01] | 0.97 [0.45, 1.34] | |||
35–39 | 2.09 [0.88, 4.96] | 1.70 [1.27, 2.28] | 0.55 [0.13, 2.46] | |||
≥ 40 | 5.93 [1.79, 19.67] | 7.89 [2.41, 25.79] | 7.36 [1.01, 53.84] | |||
BMI, kg/m2, women | ||||||
< 18.5 | 1.20 [0.78, 1.84] | 0.017 | 1.06 [0.68, 1.64] | 0.017 | 1.46 [0.14, 15.70] | 0.894 |
18.5–23.9 | Reference | Reference | Reference | |||
24–27.9 | 1.39 [0.90, 2.13] | 1.58 [1.01, 2.45] | 0.52 [0.05, 5.82] | |||
≥ 28 | 2.73 [1.40, 5.32] | 2.86 [1.31, 6.26] | NA | |||
BMI, kg/m2, men | ||||||
< 18.5 | 3.41 [1.51, 7.71] | 0.033 | 3.09 [1.42, 6.74] | 0.017 | NA | 0.965 |
18.5–23.9 | Reference | Reference | Reference | |||
24–27.9 | 1.11 [0.81, 1.52] | 1.37 [0.99, 1.90] | 1.47 [0.35, 6.23] | |||
≥ 28 | 1.07 [0.70, 1.65] | 1.26 [0.82, 1.94] | NA | |||
Menstrual duration, days | ||||||
< 2 | NA | 0.035 | NA | < 0.001 | NA | |
2–7 | Reference | Reference | Reference | 0.998 | ||
> 7 | 2.34 [1.23, 4.45] | 4.47 [2.25, 8.88] | 0.99 [0.10, 9.89] | |||
Leiomyoma | ||||||
No | Reference | 0.013 | Reference | 0.119 | Reference | 0.043 |
Yes | 1.66 [1.11, 2.46] | 1.38 [0.92, 2.07] | 5.60 [1.06, 29.76] | |||
Endometrial polyp | ||||||
No | Reference | < 0.001 | Reference | < 0.001 | Reference | 0.578 |
Yes | 2.87 [1.67, 4.94] | 2.52 [1.28, 4.97] | 1.99 [0.18, 22.32] | |||
PCOS | ||||||
No | Reference | < 0.001 | Reference | < 0.001 | NA | – |
Yes | 3.89 [2.28, 6.64] | 6.72 [1.79,7.39] | NA | |||
Endometriosis | ||||||
No | Reference | < 0.001 | Reference | 0.001 | NA | – |
Yes | 3.65 [1.92, 6.95] | 2.52 [1.27, 4.97] | NA | |||
Salpingostomy | ||||||
No | Reference | < 0.001 | Reference | < 0.001 | Reference | 0.130 |
Yes | 4.04 [2.04, 7.98] | 3.44 [1.68, 7.07] | 9.28 [0.52, 166.22] | |||
Chlamydia genitalium, women | ||||||
No | Reference | 0.024 | Reference | 0.015 | Reference | 0.587 |
Yes | 1.96 [1.09, 3.52] | 1.54 [1.09, 2.40] | 0.53 [0.05, 5.20] | |||