Table 1. Characteristics of Patients in the Discovery Set.

Variables	Discovery set (n = 48)
Age (y)	48.3 ± 18.7
Gender (male/female, n)	24 / 24
Serum creatinine (mg/dl)	0.96 ± 0.41
Blood urea nitrogen (mg/dl)	16.7 ± 8.4
Primary disease (n)
IgA nephropathy	15
Membranous nephropathy	7
Minimal change nephrotic syndrome	4
Membranoproliferative glomerulonephropathy	3
Diabetic nephropathy	2
Lupus nephritis	6
Amyloidosis	3
ANCA-related glomerulonephropathy	2
Others	6
Histopathology (grade 0–4)
Tubular cell damage grade	1.9 ± 1.1 (1–4)
Tbulointerstitial fibrosis grade	2.1 ± 1.0 (1-4)

Values are n or mean ± standard deviation.

ANCA, antineutrophil cytoplasmic antibody.