Table 1.
Distribution of baseline characteristics across quartiles of blood lead (mean ± SD, or %).
| Baseline blood lead (µg/dL) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Variables | ≤ 2.0 | 3.0 | 4.0 | ≥ 6.0 | p-Valuea | |||||
| n | 111 | 95 | 95 | 125 | ||||||
| Age (years) | 71.0 ± 6.29 | 70.7 ± 7.10 | 72.3 ± 7.13 | 72.6 ± 6.52 | 0.10 | |||||
| BMI (kg/m2) | 27.5 ± 3.64 | 27.3 ± 2.98 | 28.1 ± 3.88 | 27.8 ± 3.65 | 0.41 | |||||
| > High school education | 96.4 | 98.9 | 96.8 | 91.9 | 0.07 | |||||
| Pack-years smoking | 13.8 ± 18.8 | 21.1 ± 33.0 | 21.4 ± 24.4 | 23.7 ± 28.1 | 0.04 | |||||
| Current smoker | 1.82 | 5.26 | 3.16 | 10.0 | 0.04 | |||||
| Two or more drinks | 10.0 | 24.2 | 22.1 | 25.0 | 0.02 | |||||
| Physical activity (MET-hr/week) | 14.5 ± 17.8 | 20.3 ± 27.5 | 16.0 ± 17.2 | 11.8 ± 15.7 | 0.02 | |||||
| Hypertensive | 57.3 | 56.8 | 59.0 | 71.0 | 0.08 | |||||
| Statin use | 24.5 | 13.7 | 22.1 | 16.1 | 0.16 | |||||
| aDetermined using generalized linear equation. | ||||||||||