External validation of the adult spinal deformity (ASD) frailty index (ASD-FI)
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© 2018, Springer-Verlag GmbH Germany, part of Springer Nature. Purpose: To assess the ability of the recently developed adult spinal deformity frailty index (ASD-FI) to predict odds of perioperative complications, odds of reoperation, and length of hospital stay after adult spinal deformity (ASD) surgery using a database other than the one used to create the index. Methods: We used the ASD-FI to calculate frailty scores for 266 ASD patients who had minimum postoperative follow-up of 2 years in the European Spine Study Group (ESSG) database. Patients were enrolled from 2012 through 2013. Using ASD-FI scores, we categorized patients as not frail (NF) (< 0.3 points), frail (0.3–0.5 points), or severely frail (SF) (> 0.5 points). Multivariable logistic regression, adjusted for preoperative and surgical factors such as operative time and blood loss, was performed to determine the relationship between ASD-FI category and odds of major complications, odds of reoperation, and length of hospital stay. Results: We categorized 135 patients (51%) as NF, 90 patients (34%) as frail, and 41 patients (15%) as SF. Overall mean ASD-FI score was 0.29 (range 0–0.8). The adjusted odds of experiencing a major intraoperative or postoperative complication (OR 4.5, 95% CI 2.0–10) or having a reoperation (OR 3.9, 95% CI 1.7–8.9) were higher for SF patients compared with NF patients. Mean hospital stay was 2.1 times longer (95% CI 1.8–2.4) for SF patients compared with NF patients. Conclusions: Greater patient frailty, as measured by the ASD-FI, is associated with longer hospital stays and greater odds of major complications and reoperation. Graphical abstract: These slides can be retrieved under Electronic Supplementary Material.[Figure not available: see fulltext.].
Published Version (Please cite this version)10.1007/s00586-018-5575-3
Publication InfoShaffrey, Christopher; Miller, Emily K; Vila-Casademunt, Alba; Neuman, Brian J; Sciubba, Daniel M; Kebaish, Khaled M; ... Ames, Christopher P (2018). External validation of the adult spinal deformity (ASD) frailty index (ASD-FI). European Spine Journal, 27(9). pp. 2331-2338. 10.1007/s00586-018-5575-3. Retrieved from https://hdl.handle.net/10161/17577.
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