• Emily K Miller, Alba Vila-Casademunt, Brian J Neuman, Daniel M Sciubba, Khaled M Kebaish, Justin S Smith, Ahmet Alanay, Emre R Acaroglu, Frank Kleinstück, Ibrahim Obeid, Sánchez Pérez-Grueso Francisco Javier FJ Spine Surgery Unit, Hospital Universitario La Paz, Madrid, Spain., Leah Y Carreon, Frank J Schwab, Shay Bess, Justin K Scheer, Virginie Lafage, Christopher I Shaffrey, Ferran Pellisé, Christopher P Ames, European Spine Study Group, and International Spine Study Group.
• Department of Physical Medicine and Rehabilitation, Stanford University, Redwood City, CA, USA.
• Eur Spine J. 2018 Sep 1; 27 (9): 2331-2338.

PurposeTo 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.MethodsWe 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.ResultsWe 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.ConclusionsGreater patient frailty, as measured by the ASD-FI, is associated with longer hospital stays and greater odds of major complications and reoperation. These slides can be retrieved under Electronic Supplementary Material.

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