Table 2. Prognostic factors for IUI related to primary outcomes.
Prognostic factor Clinical pregnancy p-value OR* CI* Live birth p-value OR* CI*
No Yes No Yes
Female age
< 40 years
≥ 40 years
273
39
28 (9.3%)
1 (2.5%)		 0.1473 0.25 0.0331 - 1.8896
283
40
18 (6%)
0 (0%)		 0.1120 _ _
Male age
< 45 years
≥ 45 years
293
14
29 (9%)
0 (0%)		 0.2401 _ _
304
14
18 (5.6%)
0 (0%)		 0.3632 _ _
Type of infertility
Primary
Secondary
226
86
19 (7.8%)
10 (10.4%)		 0.4281 1.3831 0.6184 - 3.0935
231
92
14 (5.7%)
4 (4.2%)		 0.5654 0.7174 0.2301 - 2.2368
Obesity
No
Yes
201
68
20 (9%)
4 (5.6%)		 0.3477 0.5912 0.1952 - 1.7906
209
68
12 (5.4%)4 (5.6%)		 0.9675 1.0245 0.3198 - 3.2819
Endometrioma
No
Yes
298
11
29 (8.9%)
0 (0%)		 0.3016 _ _
309
11
18 (5.5%)
0 (0%)		 0.4239 _ _
AFC*
< 5
≥ 5
45
261
2 (4.3%)
27 (9.4%)		 0.2471 2.3276 0.5348 - 10.1308
46
271
1 (2.1%)
17 (5.9%)		 0.2872 2.8856 0.3749 - 22.2112
Follicles ≥ 15 mm
0
1
≥ 2
1
206
102
0 (0%)
20 (8.9%)
9 (8.1%)		 0.9295 _ _
1
213
106
0 (0%)
13 (5.8%)
5 (4.5%)		 0.3894 _ _
Hours between hCG and IUI
≤ 24 hours
> 24 hours
188
85
17 (8.3%)
6 (6.6%)		 0.6143 0.7806 0.2973 - 2.0496
195
87
10 (4.9%)
4 (4.4%)		 0.8568 0.8966 0.2736 - 2.9375
IUI endometrial thickness
< 7 mm*
≥ 7 mm*
49
257
4 (7.5%)
22 (7.9%)		 0.9331 1.0486 0.3462 - 3.1765
50
266
3 (5.7%)
13 (4.7%)		 0.7551 0.8145 0.2239 - 2.9627
COS* protocol
Clomiphene
Letrozole
Gonadotropin
Clomiphene and gonadotropin
Letrozole and gonadotropin
52
28
170
34
20
5 (8.8%)
1 (3.45%)
13 (7.1%)
5 (12.8%)
4 (16.7%)
0.9368
0.3075
0.3184
0.3045
0.1371
1.0417
0.3622
0.6787
1.7034
2.3360
0.3800 - 2.8556
0.0475 - 2.7639
0.3158 - 1.4585
0.6098 - 4.7581
0.7407 - 7.3671
55
29
175
35
20
2 (3.5%)
0 (0%)
8 (4.4%)
4 (10.3%)
4 (16.7%)
0.5126
0.1838
0.4202
0.1396
0.0097
0.6091
_
0.6766
2.3510
4.3286
0.1361 - 2.7252
-
0.2603 - 1.7584
0.7331 - 7.5392
1.3040 - 14.3684

* AFC: antral follicle count; CI: confidence interval; COS: controlled ovarian stimulation; OR: odds ratio; mm: millimeters.