| Table 1: Demo g raphic characteristics of the study and comparison groups. Values are either mean (SD) or n (%). | |||
| Parameter | Study group (n=176) | Comparison group (n=80) | p value |
| Age (yrs) | 36.6 (4.0) | 37.4 (10.0) | 0.361 |
| BMI (kg/m2) | 25.7 (2.9) | 25.3 (3.4) | 0.339 |
| Exposure duration (yrs) | 13.3 (3.3) | 0 | — |
| Diastolic blood pressure (mm Hg) | 77.7 (10.7) | 74.8 (12.7) | 0.059 |
| Systolic blood pressure (mm Hg) | 127.8 (14.6) | 127.5 (19.1) | 0.890 |
| Alcohol consumption | 95 (54%) | 39 (49%) | 0.437 |
| Smoking | 38 (22%) | 19 (24%) | 0.700 |
| Blood lead level (µg/dL) | 32 (12) | 20 (6) | 0.001 |
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