Table 1.
—Demographic and Biochemical Values for All Patients
| Characteristic | Value |
| No. patients | 97 |
| Male sex | 46 (47.4) |
| Black race | 47 (48.5) |
| Age, y | 55.2 ± 9.0 |
| Neck circumference, cm | 41.6 ± 4.5 |
| BMI, kg/m2 | 33.5 ± 6.7 |
| Duration of hypertension, y | 17.2 ± 10.3 |
| No. medications | 4.3 ± 1.1 |
| Serum potassium, mEq/L | 3.9 ± 0.4 |
| CrCl, mL/min | 115.5 ± 37.4 |
| PAC, ng/dL | 11.1 ± 6.3 |
| PRA, ng/mL/h | 2.4 ± 3.9 |
| Aldosterone/renin ratio | 14.3 ± 15.1 |
| UNa, mEq/24 h | 178.4 ± 76.7 |
| Ualdo, μg/24 h | 11.9 ± 6.5 |
| AHI | 16.8 ± 17.2 |
| Office BP, mm Hg | |
| Systolic | 156.3 ± 22.4 |
| Diastolic | 88.9 ± 13.3 |
Data are presented as No. (%) or mean ± SD unless otherwise indicated. AHI = apnea-hypopnea index; CrCl = creatinine clearance; PAC = plasma aldosterone concentration; PRA = plasma renin activity; Ualdo = urinary aldosterone; UNa = urinary sodium.