Table 1.
Basal characteristics in the different paternal groups
| Sperm concentration (M/ml) | Group A (< 1 M/ml) | Group B (1 - < 5 M/ml) | Group C (5 - < 15 M/ml) | Group D (≥ 15 M/ml) | P-value |
|---|---|---|---|---|---|
| Maternal age, years (mean ± SD) | 35.7 ± 4.1 | 36.5 ± 3.9 | 36.9 ± 4.3 | 36.6 ± 4.2 | < 0.05 |
| Number of retrieved oocytes, mean ± SD | 9.2 ± 6.0 | 9.0 ± 5.8 | 8.6 ± 5.4 | 9.3 ± 5.9 | 0.05 |
| Mature oocytes, percentage [median (IQR)] | 85.7 (74.4–94.7) | 84.6 (68.1–100) | 85.7 (76.4–95.8) | 72.2 (50.0–87.5) | < 0.001 |
| Paternal age, years (mean ± SD) | 39.2 ± 5.2 | 39.2 ± 5.4 | 39.6 ± 5.2 | 39.8 ± 5.8 | 0.58 |
| Sperm concentration, M/ml (mean ± SD) | 0.4 ± 0.36 | 3.5 ± 1.3 | 10.5 ± 3.1 | 42.0 ± 21.4 | < 0.001 |
| Sperm motility, percentage [median (IQR)] | 10.0 (5.0–20.0) | 20.0 (10.0–30.0) | 25.0 (20.0–30.0) | 40.0 (25.0–50.0) | < 0.001 |
M/ml million per milliliter, SD standard deviation, IQR Interquartile Range