TABLE 9.
Univariate Cox regression analysis for predictors of time to pregnancy in controls
| Baseline | After 6 months | |||||
|---|---|---|---|---|---|---|
| HR | 95% CI | P value | HR | 95% CI | P value | |
| Male age | 1.03 | 1.01–1.06 | 0.03 | 1.03 | 1.00–1.06 | 0.03 |
| Volume | 0.65 | 0.40–1.05 | 0.07 | 1.12 | 0.8–1.7 | 0.29 |
| Concentration | 1.01 | 0.99–1.01 | 0.12 | 1.03 | 1.02–1.04 | 0.001 |
| Progressive motility | 1.01 | 0.97–1.03 | 0.92 | 1.00 | 0.97–1.03 | 0.96 |
| Total motility | 1.002 | 0.98–1.02 | 0.97 | 1.00 | 0.98 | 0.9 |
| Normal morphology | 0.99 | 0.95–1.02 | 0.54 | 0.96 | 0.93–0.99 | 0.01 |
| CoQ10 level | 0.99 | 0.99–1.01 | 0.73 | 1.01 | 0.99–1.01 | 0.96 |
| ROS | 3.1 | 0.05–187.7 | 0.58 | 552.2 | 0.003–11319 | 0.31 |
| TAC | 1.96 | 0.66–5.7 | 0.22 | 1.7 | 0.62–4.6 | 0.29 |
| GPx | 10.9 | 0.42–282.7 | 0.15 | 10.4 | 0.25–425.9 | 0.21 |
| CAT | 0.98 | 0.89–1.07 | 0.71 | 0.99 | 0.89–1.09 | 0.85 |
| SDF | 0.92 | 0.85–1.01 | 0.06 | 0.93 | 0.87–0.99 | 0.04 |
| Female age | 1.04 | 1.01–1.08 | 0.053 | 1.04 | 1.00–1.08 | 0.05 |
| BMI | 0.98 | 0.94–1.02 | 0.47 | 0.98 | 0.95–1.02 | 0.47 |
| Family history | 0.94 | 0.34–2.5 | 0.9 | 0.94 | 0.34–2.5 | 0.9 |
| Education | 1.5 | 1.1–2.1 | 0.01 | 1.5 | 1.1–2.1 | 0.01 |
Abbreviations: HR, hazard ratio; ROS, reactive oxygen species; TAC, total antioxidant capacity; GPx, glutathione peroxidase; CAT, catalase; SDF, sperm DNA fragmentation; BMI, body mass index; CoQ10, Coenzyme Q10.