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Background and aims: Few studies have investigated the reliability of formulas estimating renal function in very old people. Methods: We studied 154 elderly people (mean age: 82 yrs). Serum creatinine (SC) was measured by the Jaffé method, and creatinine clearance (CrCl) with 24-h urine collection. Agreement was measured with the average ratio estimated/measured CrCl, and precision with the 95% agreement...
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