| Table 4. Comparative results of sperm DNA fragmentation (DFI), motility, and vitality, with logistic regression analysis for different cryopreservation protocols. | ||||||||||
| Parameter | Fresh group (1) |
Refrigerated group (2) |
Vapor group (3) |
p* (1 vs. 2) |
p* (1 vs. 3) |
p* (2 vs. 3) |
β† | OR‡ | 95% CI§ | p |
|---|---|---|---|---|---|---|---|---|---|---|
| DFI (%)|| | 27.4±9.6 | 39.6±11.4 | 35.9±10.5 | <0.001 | <0.001 | 0.001 | -0.33 | 0.72 | 0.58-0.90 | 0.001 |
| Progressive motility (%) | 49.0±13.8 | 30.4±8.3 | 27.4±5.9 | <0.001 | <0.001 | 0.341 | -0.15 | 0.86 | 0.70-1.04 | 0.108 |
| Vitality (%) | 85.1±7.1 | 64.9±9.7 | 64.1±15.0 | <0.001 | <0.001 | 0.718 | -0.05 | 0.95 | 0.82-1.09 | 0.531 |
* Paired t-test and logistic regression model used for comparison.
† β=logistic regression coefficient
‡ OR=odds ratio
§ CI=confidence interval
|| DFI= DNA fragmentation index