Table 1.
The geometric mean values of Variables of Interest within Quartiles of Lead Exposure.
| Variable | Quartile 1 * | Quartile 2 * | Quartile 3 * | Quartile 4 * | p-Value |
|---|---|---|---|---|---|
| BLL μg/dL (SE) | 0.584 (0.003) | 0.992 (0.003) | 1.52 (0.006) | 3.23 (0.054) | p < 0.0001 for all |
| Age Years (SE) | 27.1 (0.337) | 35.6 (0.335) | 43.5 (0.545) | 50.6 (0.599) | p < 0.0001 for all |
| Gender (percent) | Male: 33.9 Female: 66.1 |
Male: 46.8 Female: 53.2 |
Male: 55.3 Female: 44.7 |
Male: 62.4 Female: 37.5 |
p < 0.0001 for all |
| BMI kg/m2 (SE) | 25.9 (0.159) | 25.3 (0.204) | 26.0 (0.218) | 25.9 (0.184) | p > 0.05 for all |
| Allostatic Load (SE) | 1.93 (0.058) | 2.29 (0.040) | 2.59 (0.038) | 2.76 (0.046) | p < 0.01 for all |
| AST U/L (SE) | 24.5 (0.343) | 25.5 (0.203) | 26.3 (0.250) | 27.2 (0.358) | p < 0.05 for all |
| ALT U/L (SE) | 22.9 (0.381) | 25.7 (0.407) | 26.0 (0.325) | 26.2 (0.444) | p < 0.0001 for Q1 to Q2, Q3,and Q4 |
| GGT U/L (SE) | 20.4 (0.555) | 25.2 (0.669) | 28.5 (0.537) | 33.4 0.829) | p < 0.001 for all |
| Alkaline Phosphatase U/L (SE) | 76.9 (1.35) | 76.2 (0.775) | 73.1 (0.695) | 74.7 (0.695) | p < 0.05 for Q3 to Q2 and Q1 |
* The median blood lead level (BLL) for the quartiles were quartile 1—0.60 μg/dL, quartile 2—0.99 μg/dL, quartile 3—1.50 μg/dL, and quartile 4—2.68 μg/dL.