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From the Division of Pediatric Neurology (M.R.G., B.P.G.), Department of Neurology (L.S.W.); Division of Biostatistics (C.S.), The Regenstrief Institute (L.S.W.), Indiana University School of Medicine, Indianapolis, IN.
Address correspondence and reprint requests to Dr. Meredith R. Golomb, Indiana University School of Medicine, Riley Hospital for Children Room 1757702 Barnhill Drive, Indianapolis, IN 46202; e-mail: mgolomb{at}iupui.edu
The medical records of all children at our hospital with International Classification of Diseases 9th revision (ICD-9) codes 342, 433 to 438, or 767 from May 1999 to May 2004 were reviewed to assess whether they had stroke (any type) or, specifically, arterial ischemic stroke (AIS). Code accuracy ranged from 37 to 88%; each code missed more than half of AIS identified by the combined code search. Studies are needed to determine whether other local and national ICD-9 databases have similar limitations.
Dr. Golomb is supported by the National Institutes of Health NINDS grant K23 NS048024 and the Clarian Values Fund grant VFR-171. Dr. Williams is supported by the National Institutes of Health NINDS R01 NS 39571 and a VA Health Services Research and Development Career Award.
Disclosure: The authors report no conflicts of interest.
Received April 27, 2006. Accepted in final form August 23, 2006.
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