Table 1. Relationship between male BMI and semen quality.
| BMI categories | P | |||
|---|---|---|---|---|
| Normal (n=159) | Overweight (n=120) | Obese (n=27) | ||
| Age (year) | 35.3 (31.2; 38.5) | 35.9 (31.9; 39.3) | 35.4 (32.5; 38.6) | 0.58 |
| Semen volume (ml) | 2.9 (2.1; 4.2) | 3.0 (2.0; 4.3) | 2.7 (2.1; 4.0) | 0.81 |
| Sperm concentration (×106 ml−1) | 36.2 (19.9; 71.2) | 37.2 (21.9; 68.3) | 48.0 (22.0; 82.2) | 0.55 |
| Sperm progressive motility (a+b) (%) | 40 (30; 50) | 40 (30; 45) | 40 (35; 50) | 0.27 |
| Normal sperm morphology (%) | 19 (13; 26.5) | 19.5 (12.7; 27) | 19 (18; 27) | 0.51 |
| ZB index (%) | 87.5 (57.3; 176.7) | 88.4 (54.4; 154.5) | 103.7 (70.3; 200.7) | 0.45 |
Abbreviations: BMI, body mass index; ZB, zona binding.
Medians (25th and 75th percentiles) for age, semen parameters and ZB indices are presented according to BMI category.