Table 3 Timeline of B-Pb, Hb and ZZP in the group of lead exposed children during 60 months of follow-up.
From: Follow-up study on lead exposure in children living in a smelter community in northern Mexico
Time (months) | ||||
|---|---|---|---|---|
Variable | 0 | 6 | 12 | 60 |
B-Pb concentration (μg/dl) Median (range) | 10.12 (1.9-43.8) | 8.75 (1.85-41.45) | 8.3 (2.4-35.8) | 4.4 (1.3 - 30.3) |
B-Pb ≥ 10 μg/dl (%) | 50.84 | 39.46 | 37.42 | 5.6 |
Hemoglobin (g/dl)b | 13.4 (10.0-16.5) | 13.6 (10.2-16.6) | 13.5 (11.2 - 15.9) | 13.9 (10.7-15.9) |
ZPP b (μmol ZP/mole Heme) | 63.0 (10.0-224.0) | 62.0 (25-197) | 57 (34-180) | 65 (16-248) |
Hb < 12.4 g/dl (%) | 10.02 | 7.32 | 7.23 | 4.32 |
Hb < 12.4 g/dl Risk ratio (95% IC)ŧ | 2.41* (1.26 - 4.63) | 1.76 (0.89 - 3.48) | 1.74 (0.87 - 3.46) | 1.0 |
ZPP ≥ 66 (μmol ZP/mole Heme) (%) | 40.64 | 43.44 | 30.02 | 44.26 |