TABLE III.
The National Kidney Foundation-Kidney Disease Quality Outcomes Initiative (KDOQI) Chronic Kidney Disease (CKD) Classification System (from Reference (20))
| Stage of CKD | Kidney Damage * | eGFR ** |
|---|---|---|
| 1 | present | >90 ml/min/1.73m2 |
| 2 | present | 60–89 ml/min/1.73m2 |
| 3 | NA *** | 30–59 ml/min/1.73m2 |
| 4 | NA | 15–29 ml/min/1.73m2 |
| 5 | NA | <15 ml/min/1.73m2 (or on dialysis) |
* Kidney damage- abnormal urinalysis- hematuria or proteinuria [microalbuminuria or macroalbuminuria], abnormal imaging or abnormal morphology [renal biopsy]- persisting for 3 months or longer.
** eGFR calculated by MDRD equation persisting for 3 months or longer.
*** NA=not applicable.