| Table 2. Comparison of semen sample characteristics between the two groups | ||||
| Variable | Mean | SD | Min | Max |
| Male age (y-old) | 35.7 | 7.8 | 15.0 | 71.0 |
| Days of abstinence | 4.2 | 2.8 | 0.0 | 30.0 |
|
Semen sample volume (ml) |
3.3 | 1.7 | 0.1 | 11.3 |
| Sperm concentration/ml (million) | 38.3 | 46.7 | 0.0 | 540.0 |
|
Total sperm concentration (million) |
116.0 | 143.0 | 0.0 | 984.0 |
|
Progressive sperm motility (%) |
36.9 | 18.9 | 0.0 | 84.0 |
| Sperm morphology | 3.4 | 2.9 | 0.0 | 16.0 |