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Estimated glomerular filtration rate (eGFR)

Category Biochemistry
Test background

eGFR is calculated by the CKD-EPI equation and is reported automatically on creatinine requests for all patient 18 years and over.
It should not be used for inpatients as they may not be sufficiently metabolically stable, for children under 18 years, in pregnancy, in patients with malnourishment or muscle loss nor acute renal failure or oedematous. Caution should be used in adults with extremes of muscle mass or who consume protein supplements.

Clinical Indications

Suspected and monitoring of established chronic renal failure.

Reference range
Stage 1 ≥90 mL/min/1.73 m2
Stage 2 60-89 mL/min/1.73 m2
Stage 3 30-59 mL/min/1.73 m2
Stage 4 15-29 mL/min/1.73 m2
Stage 5 <15 mL/min/1.73 m2


Sample & container required SST (gold top)
Sample volume 0.5 mL
Turnaround time 1 day

We do not calculate eGFR below 18 years