Table 1.
Descriptive Statistics by Total Sample and Resistant Hypertension Status
| All | Resistant Hypertension | ||
|---|---|---|---|
| Yes | No | ||
| No. (%) | 475 (100) | 97 (20.4) | 378 (79.6) |
| Tibia lead, median (IQR), μg/g | 20.0 (13.0–28.5) | 20.0 (15.0–29.0) | 20.0 (13.0–28.0) |
| Patella lead, median (IQR), μg/g | 27.0 (18.0–40.0) | 25.0 (19.0–39.0) | 27.5 (18.0–40.0) |
| Blood lead, median (IQR), μg/dL | 5.0 (3.4–8.0) | 5.0 (3.0–8.0) | 5.00 (4.0–7.8) |
| Age, median (IQR), y | 67.9 (63.2–72.6) | 66.6 (62.3–70.1) | 68.1 (63.5–73.0) |
| BMI, median (IQR), kg/m2 | 27.8 (25.6–30.4) | 28.7 (26.6–31.2) | 27.6 (25.4–30.3) |
| Pack‐years of smoking, median (IQR) | 13.6 (0.0–34.0) | 8.8 (0.0–25.5) | 15.7 (0.0–36.0) |
| Smoking status, % | |||
| Never | 28.8 | 30.9 | 28.3 |
| Current | 4.8 | 4.1 | 5.0 |
| Former | 66.3 | 64.9 | 66.7 |
| Annual income, % | |||
| <$6000 | 29.3 | 29.8 | 29.4 |
| $6000–$8599 | 30.5 | 31.9 | 30.2 |
| $8600–$9999 | 18.1 | 19.1 | 17.8 |
| ≥$10 000 | 22.1 | 19.1 | 22.8 |
| Race, white, % | 96.8 | 96.9 | 96.8 |
| Education, % | |||
| Grade school | 0.2 | 0.0 | 0.3 |
| High school dropout | 8.6 | 8.5 | 8.7 |
| High school graduate | 36.2 | 34.0 | 36.7 |
| Technical support | 10.9 | 8.5 | 11.5 |
| College dropout | 13.5 | 23.4 | 11.0 |
| College graduate | 17.9 | 13.8 | 18.9 |
| Graduate school | 5.5 | 4.3 | 5.8 |
| Professional school | 7.2 | 7.4 | 7.1 |
BMI indicates body mass index (calculation of weight in kilograms divided by the square of height in meters); IQR, interquartile range.