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Baseline values of oxidative stress-related parameters measured in blood of vardenafil- and placebo-treated patients (mean ± SD).
| Blood parameter | Vardenafil (N = 21) | Placebo (N = 21) |
| Malondialdehyde (μmol/l) | 0.07 ± 0.02 | 0.07 ± 0.02 |
| Protein carbonyl (nmol/mg protein) | 0.32 ± 0.12 | 0.29 ± 0.12 |
| Total antioxidative status (mmol/l) | 1.42 ± 0.30 | 1.45 ± 0.14 |
| Homocysteine (μmol/l) | 10.59 ± 3.52 | 9.27 ± 2.40 |
