Abstract
The 5-item modified frailty index (mFI-5) is a validated tool to assess postoperative risks in older surgical candidates. We sought to compare the predictive ability of mFI-5 to its individual components and other established risk factors for complications in flap reconstruction of late-stage pressure ulcer repair. The 2012 to 2018 American College of Surgeons National Surgical Quality Improvement Project (ACS-NSQIP) database was queried for pressure ulcer diagnosis and reconstructive flap repair procedures. Univariate and multivariate regression analysis models were used to assess how mFI-5, the components of the mFI-5 (functional status before surgery, diabetes, history of chronic obstructive pulmonary disease, history of congestive heart failure, and history of hypertension requiring medicine), and other factors commonly used to risk-stratify (age, obesity, ASA classification, and history of smoking) were associated with complications. 35.1% of the total 1254 flap reconstructive procedures for pressure ulcer repair experienced complications. Most cases had at least one of the five mFI-5 factors in both the complication (42.7%) and no complication (45.7%) cohorts. Compared with the factors making up the mFI-5 score and other common variables used to risk-stratify, mFI-5 was significantly associated with complications in the univariate (OR 1.17, CI 1.03 - 1.33; P=0.02) and multivariate analysis (OR 1.16, CI 1.02 - 1.34; P=0.043). The mFI-5 is a useful predictor of postoperative outcomes in patients undergoing reconstructive flap surgery for pressure ulcer injuries compared to other historically considered risk factors for surgical complications.
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