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Stages of CKD
| Stage | Description | GFR (mL/min/1.73 m2 body surface area) |
| 1 | Kidney damage* with normal or increased GFR | ≥90 |
| 2 | Kidney damage* with mildly decreased GFR | 60–89 |
| 3 | Moderately decreased GFR | 30–59 |
| 4 | Severely decreased GFR | 15–29 |
| 5 | Kidney failure | <15 or dialysis |
Kidney damage defined as abnormalities on pathological, urine, blood, or imaging tests. Adapted from ref. 359.
