| Variables | Infertile men (n = 201) n (%) | Fertile men (n = 200) n (%) |
| Previous medical condition* | 40 (20.0) | 17 (8.5) |
| High risk occupational exposures | 159 (79.1) | 172 (86.0) |
| Prolong sitting | 133 | 152 |
| Heat | 6 | 8 |
| Solvents | 4 | 4 |
| Pesticides | 4 | 1 |
| Fumes | 9 | 5 |
| Metals | 3 | 2 |
| Tobacco usage | 74 (36.8) | 100 (50.0) |