Table 1.
Characteristics of the study population by hypertension status.
| Overall | Normal | Hypertension | P | |
|---|---|---|---|---|
| N | 2638 | 1227 (54.8 %) | 1411 (45.2 %) | |
| Age (years) | 56.7 (12.4) | 52.5 (10.6) | 61.6 (12.5) | <0.001 |
| Gender (% female) | 51.8 | 51.4 | 52.4 | 0.74 |
| Race | 0.007 | |||
| Non-Hispanic White (%) | 78.8 | 79.7 | 77.9 | |
| Non-Hispanic Black (%) | 9.5 | 7.6 | 11.9 | |
| Mexican American (%) | 4.9 | 5.7 | 3.9 | |
| Other (%) | 6.7 | 7.0 | 6.3 | |
| Education (% High school) | 81.4 | 84.4 | 77.7 | 0.004 |
| Body Mass Index (kg/m2) | 28.5 (5.7) | 27.5 (5.3) | 29.7 (5.8) | <0.001 |
| Current smoker (%) | 21.1 | 25.1 | 16.3 | <0.001 |
| Dietary Supplements (%) | 62.4 | 60.5 | 64.7 | 0.18 |
| Selenium (µg/L) | 137.1 (19.3) | 136.1 (18.8) | 138.3 (19.8) | 0.02 |
| Systolic BP (mmHg) | 127.9 (19.5) | 118.1 (11.5) | 139.8 (20.5) | - |
| Diastolic BP (mmHg) | 72.4 (13.2) | 71.4 (9.4) | 73.6 (16.6) | - |
| Pulse Pressure (mmHg) | 55.6 (20.9) | 46.7 (12.2) | 66.3 (24.1) | - |
Values are survey weighted means (standard deviation) or percentages for continuous or categorical variables, respectively.