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Which equation do labs use to calculate eGFR using serum creatinine values? 5 labs use CKD-EPI and 3 labs use both MDRD and CKD-EPI. 3 labs also elaborated that they use the Schwartz formula in pediatric patients, while for adults older than 70, 1 lab runs cystatin C and then applies the corresponding formula. Some researchers have also proposed a full-age spectrum formula to eliminate the discrepancies observed between the CKD-EPI and Schwartz formulas in patients who are 17 years old (the transition age between pediatric and adult care).


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