Table 3. Seminal characteristics of infertile patients according to birth weight.
| LBW | NBW | HBW | p-valuea | ||
|---|---|---|---|---|---|
| No. of patients (n=1,063) | 79 (7.5) | 807 (76.0) | 177 (16.5) | ||
| Semen volume (mL) | 0.6 | ||||
| Median (IQR) | 3.0 (1.5–3.5) | 3.0 (2.1–4.0) | 3.0 (2.0–4.0) | ||
| Range | 0.2–8.0 | 0.5–10.0 | 0.5–10.0 | ||
| Sperm concentration (×106/mL) | 0.2 | ||||
| Median (IQR) | 18.5 (3.2–50.0) | 19.4 (5.4–51.0) | 19.2 (5.5–55.8) | ||
| Range | 0.5–204.4 | 1.1–305.9 | 0.5–306 | ||
| Sperm concentration ≤16×106/mL | 36 (45.5) | 362 (44.8) | 80 (45.1) | 0.3 | |
| Progressive motility (%) | 0.01 | ||||
| Median (IQR) | 20 (8–36) | 26 (14–41)b | 25 (11–40)b | ||
| Range | 0–70 | 0–96 | 0–76 | ||
| Progressive motility ≤30% | 46 (58.2) | 406 (50.3) | 90 (50.8) | <0.01 | |
| Normal morphology (%) | 0.03 | ||||
| Median (IQR) | 2 (1–6) | 4 (1–8)b | 4 (1–8)b | ||
| Range | 0–100 | 0–98 | 0–99 | ||
| Normal morphology ≤4% | 47 (59.5) | 335 (41.5) | 80 (45.1) | 0.01 | |
| SDF (%) | <0.01 | ||||
| Median (IQR) | 45.7 (26.6–59.5) | 29.8 (13–50)b | 24 (18–45)b | ||
| Range | 9.8–96.4 | 0.5–100.0 | 2.0–90.0 | ||
| SDF >30% | 55 (69.6) | 413 (51.1) | 77 (43.5) | 0.01 | |
| Assisted-pregnancy rate (n=282) | 11/42 (26.1) | 64/185 (34.5) | 19/55 (34.5) | 0.01 | |
Values are presented as numbers (%) otherwise indicated.
IQR: interquartile range, LBW: low birth weight, NBW: normal birth weight, HBW: high birth weight, SDF: sperm DNA fragmentation.
ap-value according to chi-square test or the Kruskall-Wallis test, as indicated. bp<0.01 vs LBW group.