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Percentage of REGARDS participants with reduced eGFRcr for whom this result was confirmed using eGFRcys stratified by age
eGFRcr – estimated glomerular filtration rate using serum creatinine, eGFRcys – estimated glomerular filtration rate using serum cystatin-C, REGARDS – REasons for Geographic And Racial Differences in Stroke. Reduced eGFR was defined as eGFR < 60 ml/min/1.73 m2.
