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Classification of diabetic nephropathy [12].
| Stage | Albuminuria (mg/g Cr) or proteinuria (g/g Cr) | GFR (mL/min/1.73 m2) |
|---|---|---|
| Stage 1 (prenephropathy) | Normoalbuminuria (<30) | ≥30 |
| Stage 2 (incipient nephropathy) | Microalbuminuria (30–299) | ≥30 |
| Stage 3 (overt nephropathy) | Macroalbuminuria (≥300) or persistent proteinuria (≥0.5) | ≥30 |
| Stage 4 (kidney failure) | Any albuminuria/proteinuria status | <30 |
| Stage 5 (dialysis therapy) | Any status on continued dialysis therapy |
