Calculated estimate of kidney filtration capacity using the CKD-EPI equation incorporating creatinine (±cystatin C), age, and sex. Used to stage chronic kidney disease.
| Sex | Age | Range | Notes |
|---|---|---|---|
| All | ≥ 18 yrs | > 60 | Adult; ≥60 considered adequate. Stages: G1 ≥90, G2 60–89, G3a 45–59, G3b 30–44, G4 15–29, G5 <15 |
⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.