Table 1. Infertility factors in IUI cycles and primary outcomes.
Infertility factor Clinical pregnancy p-value OR* CI* Live birth p-value OR* CI*
No Yes No Yes
Unexplained infertility
No
Yes		 233
79		 19 (7.5%)
10 (11.2%)		 0.2825 1.5523 0.6925 - 3.4794 242
81		 10 (4%)
8 (9%)		 0.0686 2.3901 0.9123 - 6.2619
Male factor
No
Yes		 207
105		 18 (8%)
11 (9.5%)		 0.6419 1.2048 0.5490 - 2.6439 213
110		 12 (5.3%)
6 (5.2%)		 0.9498 0.9682 0.3538 - 2.6493
Endometriosis 1 and 2
No
Yes		 289
23		 27 (8.5%)
2 (8%)		 0.9252 0.9308 0.2081 - 4.1621 299
24		 17 (5.4%)
1 (4%)		 0.7665 0.7328 0.0935 - 5.7453
Endometriosis 3 and 4
No
Yes		 299
13		 29 (8.8%)
0 (0%)		 0.2624 _ _ 310
13		 18 (5.5%)
0 (0%)		 0.3855 _ _
PCOS*
No
Yes		 259
53		 23 (8.2%)
6 (10.2%)		 0.6141 1.2748 0.4951 - 3.2826 267
56		 15 (5.3%)
3 (5.1%)		 0.9416 0.9536 0.2671 - 3.4044
Unilateral tubal obstruction
No
Yes		 282
30		 28 (9%)
1 (3.2%)		 0.2691 0.3357 0.0441 - 2.5558 293
30		 17 (5.5%)
1 (3.2%)		 0.5919 0.5745 0.0738 - 4.4694
Low reserve
No
Yes		 268
44		 27 (9.2%)
2 (4.4%)		 0.2772 0.4512 0.1036 - 1.9648 278
45		 17 (5.8%)
1 (2.2%)		 0.3113 0.3634 0.0472 - 2.7982
Independent production
No
Yes		 310
2		 29 (8.6%)
0 (0%)		 0.6654 _ _ 321
2		 18 (5.3%)
0 (0%)		 0.7378 _ _
Other factor
No
Yes		 250
62		 28 (10.1%)
1 (1.6%)		 0.0293 0.1440 0.0192 - 1.0790 261
62		 17 (6.1%)
1 (1.6%)		 0.1467 0.2476 0.0323 - 1.8963

* CI: confidence interval; OR: odds ratio; PCOS: Polycystic Ovary Syndrome.