Table 1.
Characteristics by participation status and patella lead level.
| Did not participate Patella lead level
|
Participated Patella lead level
|
|||
|---|---|---|---|---|
| Characteristic | Low (n = 90) | High (n = 103) | Low (n = 15) | High (n = 16) |
| Mean age in years ± SD at MRSa | 73.0 ± 6.2 | 78.0 ± 5.9 | 73.2 ± 4.7 | 80.7 ± 6.1 |
| Mean years ± SD of education | 15.3 ± 2.5 | 13.2 ± 2.6 | 16.3 ± 3.1 | 13.4 ± 2.6 |
| Mean ± SD serum creatinine (mg/dL) | 1.1 ± 0.5 | 1.1 ± 0.3 | 1.0 ± 0.2 | 1.2 ± 0.4 |
| Mean ± SD systolic blood pressure (mmHg) | 134 ± 16 | 134 ± 17 | 133 ± 15 | 135 ± 20 |
| Diabetes, n (%) | 7 (8) | 5 (5) | 0 | 1 (6) |
| Hypertension, n (%) | 28 (31) | 36 (35) | 4 (27) | 7 (44) |
| Taking hypertension medication, n (%) | 9 (10) | 15 (15) | 1 (7) | 6 (38) |
| Myocardial infarction, n (%) | 0 | 6 (6) | 0 | 1 (6) |
| Stroke, n (%) | 0 | 3 (3) | 0 | 1 (6) |
| Median (IQR) patella lead (μg/g bone) | 10 (6–14) | 48 (44–60) | 9 (5–15) | 63 (43–86) |
| Median (IQR) tibia lead (μg/g bone) | 11 (7–17) | 32 (24–41) | 13 (9–17) | 41 (38–59) |
Hg, mercury.
a
Age on 1 January 2002 for those without MRS.