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A Prospective Analysis of the SVS WIfI Classification System to Stratify Immediate and 1-Year Patient Outcomes.
Journal of Foot and Ankle Surgery 2023 Februrary 16
The purpose of this study was to prospectively enroll patients that presented to the emergency department with a lower extremity infection, stratify risk and record outcomes. Risk stratification was performed based on the Society of Vascular Surgery Wound, foot Infection, and Ischemia (WIfI) classification system. This study aimed to establish the efficacy and validity of this classification in predicting patient outcomes during immediate hospitalization and throughout a 1 year follow up. A total of 152 patients were enrolled in the study and of these, 116 met the inclusion criteria and had at least 1 year of follow up for analysis. Each patient was assigned a WIfI score based on wound, ischemia, and foot infection severity according to the classification guidelines. Patient demographics as well as all podiatric and vascular procedures were recorded. The major end points of the study were rates of proximal amputation, time to wound healing, surgical procedures, surgical dehiscence, readmission rates, and mortality. A difference in rates of healing (p = .04), surgical dehiscence (p < .01), and 1 year mortality (p = .01) with increasing WIfI stage as well as across the individual component scores was noted. This analysis further supports the application of the WIfI classification system early during patient care to stratify risk and identify the need for early intervention and a multispecialty team approach to potentially improve outcomes in the severe multicomorbid patient.
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