Fig. 2

The frequency of different forms of biopsy-proven pathological diagnoses excluding renal transplantation (n = 1281). Primary glomerulonephritides accounted for 48.1%, secondary glomerulonephritides accounted for 36.2%, whereas tubulointerstitial diseases accounted for 12.3%. IgA nephropathy was the most frequent diagnoses among primary glomerulonephritides. On the other hand, diabetic nephropathy and lupus nephritis were the most common among secondary glomerulonephritides