An 82-year-old nursing home resident has a serum creatinine of 0.7 mg/dL. Which method is most appropriate for estimating her renal function for drug dosing?
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A
Use raw serum creatinine as a marker of normal renal function
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B
Apply the Cockcroft-Gault equation using actual body weight
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C
Use the CKD-EPI equation alone without adjusting for low muscle mass
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D
Assume normal renal function since creatinine is within normal range