Table I.

 Characteristics of the Study Sample (N=83)

Characteristic	No.	Mean ± Standard Deviation	Range
Age, y	81	59.2±12.2	21–82
Body mass index, kg/m²	77	28.5±5.7	18.4–45.4
Systolic blood pressure, mm Hg	80	129.4±16.0	95.0–180.0
Diastolic blood pressure, mm Hg	80	83.4±11.8	50.0–120.0
Serum urea nitrogen, mg/dL	77	17.9±7.2	6.0–38.0
Serum creatinine, mg/dL	78	1.1±0.4	0.7–2.3
Male, %	81	55.3
Race/ethnicity, %	80
White		63.8
Black		25.0
Other non‐white		11.3
Hypertensive	81	91.6
Taking a diuretic	81	56.8