The results that you quote are within the usual variability of laboratory testing. Unfortunately, our estimating equations and the laboratory testing cannot reliably tell the difference between an estimated glomerular filtration rate (eGFR) of 84 and 102 milliliters per minute per 1.73 meters squared. The testing and the equation are much better with an eGFR of less than 60. The numbers that you quote are likely within the normal range for kidney function.
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