Abstract
Category: Ankle Introduction/Purpose: Total ankle arthroplasty (TAA) is an effective treatment for various ankle pathologies, but some concern remains for the relatively high associated complication and failure rates relative to major joint arthroplasty of the hip and knee. Patient body mass index (BMI) is a modifiable and potentially important preoperative variable when evaluating postoperative complications. The purpose of this study is to evaluate the effect of BMI on the acute postoperative complication rate after TAA. Methods: We performed a retrospective review to identify a large cohort of adult patients who underwent TAA between 2006 - 2020 from the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database. Using overweight patients as the reference BMI group, we estimated log-binomial models to estimate risk ratios on outcomes, while also adjusting for sex and age, in order to investigate whether there was a significant difference in complication rate between the BMI groups. Results: We found that, relative to overweight patients, there was no statistically significant difference in the risk of acute complications for underweight (p-value=0.062), healthy weight (p-value=0.800), obese (p-value=0.993), or morbidly obese (p- value=0.781) patients who underwent TAA. There was also no statistically significant difference in the risk of acute complications based on age (p-value=0.876) or sex (p-value=0.696) for TAA. Additionally, there was no significant difference between the BMI groups when comparing how many patients had a complication out of the total number of patients in their respective BMI group for either major complications (p-value=0.9835) or minor complications (p-value=0.0578). Conclusion: We found that BMI, age, and sex did not lead to a statistically significant difference in the risk of complications, even when stratified by major vs minor complications, within 30 days postoperatively for TAA.
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