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Modified Revised Cardiac Risk Index over time among patients hospitalized for major non-cardiac surgery from 2008–2013.
Modified Revised Cardiac Risk Index (RCRI) score using ICD-9 codes for ischemic heart disease, heart failure, prior TIA or stroke, chronic kidney disease, diabetes mellitus, and high-risk surgery. Due to the introduction of an ICD9 diagnosis code for prior stroke or TIA in mid-2007, modified RCRI scores were calculated from 2008–2013 data.
