| Table 1. General characteristics of the three age groups studied | |||||
| Characteristic | Age Group | ||||
| Total | ≤ 35 years | 36–45 years | > 45 years | P | |
| Patients (n) | 1500 | 597 | 727 | 176 | |
| Age (years) |
37.7 ± 6.7 (22–76) |
31.8 ± 2.7 (22–35) |
39.5 ± 2.7 (36–45) |
50.6 ± 5.3 (46–76) |
|
| Body mass index |
28.3 ± 4.3 (17–44.1) |
28.6 ± 4.4 (17–43.1) |
28.2 ± 4.1 (18.9–42.9) |
28.2 ± 4.4 (19.8–44.1) |
ns |
| Fathered at least one child |
33.0% (495/1500) |
21.8% A,B (130/597) |
37.3% A,C (271/727) |
53.4% B,C (94/176) |
A,B< 0.0001 C0.0001 |
| Duration of infertility (years) |
3.9 ± 3.0 (1–11) |
3.1 ± 2.0 A,B (1–8) |
4.1 ± 3.0 A (2–10) |
5.4 ± 4.5 B (1–11) |
A,B< 0.0001 |
|
Varicocele |
17.1% (257/1500) |
15.9% (95/597) |
18.2% (132/727) |
17% (30/176) |
ns |
| Tobacco use |
11.7% (176/1500) |
13.4% (80/597) |
10.5% (76/727) |
11.4% (20/176) |
ns |
| Regular alcohol use |
64.1% (962/1500) |
64.5% (385/597) |
64.8% (471/727) |
60.2% (106/176) |
ns |
| Vitamin supplement use |
15.1% (227/1500) |
15.2% (91/597) |
14.7% (107/727) |
16.5% (29/176) |
ns |
| Values within rows with the same superscript letter were significantly different | |||||