Table 1.

Reasons for renal biopsy in type 2 diabetic patients^⁎, ^†

Reason for renal biopsy	Group I (n=10)	Group II (n=11)	Group III (n=54)	P‡
Nephrotic range proteinuria with atypical course (n=33)	5 (15.2)	8 (24.2)	20 (60.6)	0.003
Proteinuria without diabetic retinopathy (n=15)	2 (13.3)	1 (6.7)	12 (80.0)	0.001
Unexplained decline of renal function (n=15)	1 (6.7)	1 (6.7)	13 (86.7)	<0.001
Unexplained hematuria (n=10)	1 (10.0)	1 (10.0)	8 (80.0)	0.007
Proteinuria with short duration of diabetes (n=2)	1 (50.0)	0 (0)	1 (50.0)	NS

Data are presented as n (%).

DN, diabetic nephropathy; NN, nondiabetic nephropathy; NS, nonsignificant value.

^⁎Differences in prevalence among the three groups were analyzed separately with nonparametric tests according to reason for biopsy.

^†Group I: DN, Group II: DN+NN, Group III: NN.

^‡P=0.514 by Fisher′s exact test.