Table 1.

Study population characteristics

Characteristic	Healthy Volunteers	Patients with ESRD
n	17	16
Gender (M/F)	7/10	7/9
Age (yr; mean ± SEM)	43 ± 3.4	51 ± 3.2
Primary kidney disease
diabetic nephropathy		5
glomerulonephropathy		–
hypertensive nephropathy		3
polycystic kidney disease		2
other		6