Table 2.
Patient characteristics
| BMI (<25) n=312 (36.4%) | BMI (25–29.9) n=376 (37.6%) | BMI (≥30) n=170 (19.8%) | p* | p+ | |
|---|---|---|---|---|---|
| Age (year) | 29 (26–33)a | 30 (28–34)b | 31 (28–35)b | <0.001 | NA |
| Prolactin (ng/mL) | 8.2 (5.6–11.6) | 8.3 (6–10.7) | 8.5 (7–11) | 0.140 | 0.063 |
| FSH (mIU/mL) | 4 (2.4–6.8) | 4.2 (2.6–6.8) | 4.2 (2.6–6.5) | 0.793 | 0.321 |
| LH (mIU/mL) | 4.3 (3–5.9) | 3.9 (2.8–5.5) | 4.2 (2.8–5.4) | 0.222 | 0.402 |
| Total testosterone (ng/dL) | 472.1 (353.7–631.7)a | 398 (297.8–522.8)b | 348.1 (261–470)c | <0.001 | <0.001 |
| Estradiol (pg/mL) | 31.6 (22.3–43.2) | 30.3 (21–42.3) | 29.6 (20.9–40) | 0.484 | 0.665 |
| Testosterone/estradiol ratio | 16.2 (9.9–23.9)a | 13.2 (8.6–20)a | 12.1 (8.2–18.7)b | 0.001 | 0.306 |
| Semen volume (mL) | 2.6 (2–3.7) | 2.5 (2–3.4) | 2.4 (1.9–3.5) | 0.635 | 0.422 |
| Sperm concentration (×106/mL) | 12.5 (2.6–30.3) | 15 (3.1–35) | 10.7 (2.4–34) | 0.407 | 0.336 |
| Total sperm count (×106) | 35.5 (6–80) | 33.4 (7.8–89.9) | 25.5 (6.9–79.7) | 0.608 | 0.664 |
| Progressive motility (%) | 27 (16–35) | 28 (20–38) | 27 (17.7–33) | 0.114 | 0.077 |
| Total progressive motile sperm (×106) | 6.8 (0.9–21.7) | 8.6 (1.3–28.5) | 6.2 (1.3–24.5) | 0.247 | 0.239 |
FSH: follicle stimulating hormone; LH: luteinizing hormone; BMI: body mass index (kg/m2); NA: not available; p*: Kruskal–Wallis, Intergroup comparisons; p+, Covariance analyses, Age-adjusted intergroup comparisons. Values are expressed as median (25th–75th percentiles).
a, b, c
Statistically significant groups are shown in different letters.
If the groups labelled by the same letter, it means that there is no statistical difference.