Table 1 Comparison of participants' baseline characteristics between SOF and lead ancillary study.
From: Association of blood lead concentrations with mortality in older women: a prospective cohort study
Characteristics (N total = 9704) | Lead cohort N = 533 | SOF participants N = 9171 | P value |
|---|---|---|---|
Age (years), mean SD | 70 ± 4 | 72 ± 5 | < 0.001 |
Body mass index (kg/m2)), mean SD | 27 ± 5 | 26 ± 4 | 0.147 |
Education (years), mean SD | 12 ± 3 | 13 ± 3 | 0.135 |
Alcohol (drinks/wk), mean SD | 1.9 ± 4 | 1.8 ± 4 | 0.737 |
Current smoker, n (%) | 65 (12) | 902 (10) | 0.079 |
Hypertension, n (%) | 153 (29) | 3594 (39) | < 0.001 |
Diabetes, n (%) | 55 (10) | 652 (7) | 0.006 |
Current estrogen use, n (%) | 67 (13) | 1400 (15) | 0.091 |
Walk for exercise (yes/no), n (%) | 213 (40) | 4653 (51) | < 0.001 |
Total hip, bone density (g/cm2), mean SD | 0.77 ± 0.13 | 0.76 ± 0.13 | 0.536 |