OR (95% CI) of reduced semen quantity and quality by current blood lead concentration
| Current blood lead concentration (μg/dl) | All | Cases | % | Crude OR | Adjusted OR | 95% CI |
|---|---|---|---|---|---|---|
| Volume ≤1.5 ml: | ||||||
| 0–10 | 149 | 21 | 14.9 | 1.00 | 1.00 | Reference |
| 10.1–20 | 57 | 8 | 14.0 | 1.0 | 0.7 | 0.3 to 1.8 |
| 20.1–30 | 90 | 21 | 23.3 | 1.9 | 1.2 | 0.6 to 2.4 |
| 30.1–40 | 101 | 26 | 25.7 | 2.1 | 1.2 | 0.6 to 2.6 |
| 40.1–50 | 63 | 17 | 27.0 | 2.2 | 1.2 | 0.5 to 2.8 |
| ≥50.1 | 24 | 6 | 25.0 | 1.9 | 1.3 | 0.4 to 3.8 |
| Density ≤20 millions/ml: | ||||||
| 0–10 | 149 | 29 | 19.5 | 1.00 | 1.00 | Reference |
| 10.1–20 | 57 | 13 | 22.8 | 1.2 | 1.2 | 0.5 to 2.7 |
| 20.1–30 | 90 | 24 | 26.7 | 1.5 | 1.4 | 0.7 to 2.9 |
| 30.1–40 | 101 | 26 | 25.7 | 1.4 | 1.3 | 0.7 to 2.7 |
| 40.1–50 | 63 | 16 | 25.4 | 1.4 | 1.2 | 0.5 to 2.6 |
| ≥50.1 | 24 | 9 | 37.5 | 2.3 | 2.3 | 0.9 to 6.2 |
| Total count ≤50 millions/ml: | ||||||
| 0–10 | 149 | 26 | 17.5 | 1.00 | 1.00 | Reference |
| 10.1–20 | 57 | 15 | 26.3 | 1.6 | 1.6 | 0.7 to 3.5 |
| 20.1–30 | 90 | 21 | 23.3 | 1.5 | 1.3 | 0.7 to 2.7 |
| 30.1–40 | 101 | 25 | 24.8 | 1.5 | 1.2 | 0.6 to 2.5 |
| 40.1–50 | 63 | 12 | 19.1 | 1.1 | 0.9 | 0.4 to 2.1 |
| ≥50.1 | 24 | 12 | 50.0 | 4.3 | 4.4 | 1.6 to 11.6 |
| Mean αT: | ||||||
| 0–10 | 104 | 28 | 27.0 | 1.00 | 1.00 | Reference |
| 10.1–20 | 53 | 14 | 26.4 | 1.1 | 1.1 | 0.5 to 2.4 |
| 20.1–30 | 77 | 17 | 22.1 | 0.8 | 0.7 | 0.3 to 1.6 |
| 30.1–40 | 91 | 17 | 18.7 | 0.6 | 0.6 | 0.3 to 1.3 |
| 40.1–50 | 59 | 15 | 25.4 | 1.0 | 1.1 | 0.5 to 2.5 |
| ≤50.1 | 20 | 6 | 30.0 | 1.4 | 1.5 | 0.5 to 4.5 |
| Proportion of sperm cells outside the main population: | ||||||
| 0–10 | 104 | 32 | 30.8 | 1.00 | 1.00 | Reference |
| 10.1–20 | 53 | 13 | 24.5 | 0.8 | 1.0 | 0.4 to 2.2 |
| 20.1–30 | 76 | 17 | 22.4 | 0.7 | 0.8 | 0.4 to 1.6 |
| 30.1–40 | 91 | 22 | 24.2 | 0.7 | 1.0 | 0.5 to 2.1 |
| 40.1–50 | 59 | 15 | 25.4 | 0.8 | 1.3 | 0.6 to 2.9 |
| ≤50.1 | 20 | 6 | 30.0 | 1.2 | 1.8 | 0.6 to 5.6 |