Imperial Collage Healthcare

Estimated glomerular filtration rate (eGFR)

Test Background
Calculation of the MDRD formula-derived eGFR is performed automatically on all creatinine requests as a screening test for kidney disease. It is invalidated by: acute renal failure, pregnancy, oedematous states, muscle-wasting disorders, in amputees and the malnourished. eGFR only correlates to CKD stage in the presence of other clinical indicators such as haematuria/ proteinuria.

Clinical Indications
Suspected and monitoring of established chronic renal failure.

Reference Range

Stages 1 and 2 : >50 mL/min/1.73 m2
Stage 3 : 30-59 mL/min/1.73 m2
Stages 4 and 5 : 2

Sample Required
SST (gold top)

Sample Volume
0.5 mL

Turnaround Time
1 day


If patient is of black African origin, multiply eGFR by 1.2

We do not calculate eGFR below 18 years

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