Table 1.

Characteristics of study subjects^a

	Control (n = 19)	CKD (n = 25)
Age (years)	46.5 ± 2.4	52.8 ± 3.7
Sex (male/female)	9/10	14/11
Body weight (kg)	68 ± 3	71 ± 2
HD/CAPD	n.a.	20/5
Serum creatinine (μmol/L)	86 ± 2	848 ± 45*
Serum Na (mmol/L)	141 ± 1	139 ± 1
Serum K (mmol/L)	4.3 ± 0.1	5.3 ± 0.1*
Systolic blood pressure (mmHg)	125 ± 2	127 ± 4
Diastolic blood pressure (mmHg)	76 ± 1	81 ± 3
Hypertension (yes/no)	0/19	16/9

^aMeans ± SEM.

^*P < 0.001 versus healthy subjects, two-tailed t-test. n.a, not applicable.