Table 1.

Baseline characteristics of the 383 patients included in the study

Patient characteristics	Patients (n = 383)
Age, yr [mean (SD)]	56.5 (18.1)
Women	160 (41.8%)
Diabetes	100 (26.1%)
Primary renal disease
Glomerulonephritis	121 (31.6%)
Diabetes	54 (14.1%)
Vascular	44 (11.5%)
Pyelonephritis	34 (8.9%)
High blood pressure	16 (4.2%)
Polycystic kidney disease	15 (3.9%)
Other	51 (13.3%)
Unknown	48 (12.5%)

SD: standard deviation.