Detecting chronic kidney disease in population-based administrative databases using an algorithm of hospital encounter and physician claim codes

BackgroundLarge, population-based administrative healthcare databases can be used to identify patients with chronic kidney disease (CKD) when serum creatinine laboratory results are unavailable. We examined the validity of algorithms that used combined hospital encounter and physician claims database codes for the detection of CKD in Ontario, Canada.MethodsWe accrued 123,499 patients over the age of 65 from 2007 to 2010. All patients had a …