Why the study?
Are ICD-9 codes valid for identifying ischemic stroke and intracranial hemorrhage among individuals with atrial fibrillation?
Are ICD-9 codes valid for identifying ischemic stroke and intracranial hemorrhage among individuals with atrial fibrillation?
Administrative data using ICD-9 codes to identify stroke in AF patients is inaccurate and requires validation.
ICD-9 codes inaccurately identify stroke in AF; leaves open their reliability for administrative research without validation.
Using ICD-9 stroke and AF codes to identify patients with stroke plus AF resulted in inaccuracies. Given the expanded financial and policy implications of patient-oriented research, conclusions derived solely from administrative data without validation of outcome events should be interpreted with caution.
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Thigpen et al. (2015) studied this question.
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