EGFR?: The "e" in egfr stands for "estimated". It is arrived from a formula that takes into account a patient's age, sex, race and serum creatinine value. As with all estimates, that's just what it is. If you want the actual gfr, a 24 hour urine is collected for creatinine clearance. See you doctor or a nephrologist for that. Remember, an actual GFR is much better than a egfr.
Answered 6/10/2014
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