• Xavier Plano, Manuel Ramírez, Antonia Matamalas, Sleiman Haddad, García de Frutos Ana A Spine Unit, Orthopaedic Department, Hospital Universitari Vall d'Hebron, Passeig de la Vall d'Hebron, 119-129, 08035, Barcelona, Spain., J M Casamitjana, and Ferran Pellisé.
• Orthopaedic Department, Viladecans Hospital, Barcelona, Spain.
• Eur Spine J. 2019 May 1; 28 (5): 1209-1216.

Study DesignRetrospective cohort study.ObjectiveAnalyze the rate and risk factors associated with Unplanned Surgeries (US) during the first 30 days in patients treated for cervical spondylotic myelopathy.BackgroundUS are often regarded as a potentially useful quality of care indicator.MethodsWe defined US as any, non-planned, surgical procedure as a complication after "index" surgery. Demographic data, comorbidities, ASA, smoking status, surgical details and postoperative complications were collected. We conducted a subjective outcome test using the Global Outcome Score (GOS). To assess risk factors, a bivariate analysis was performed using T Student or Chi-square. Risk is shown as odds ratio (OR) with 95% confidence interval (CI). Multivariable logistic regression models with bootstrap resampling procedure were performed.
 RESULTS: The study included 303 patients (200 men) with mean age of 57.7 years (27-86) and mean follow-up of 75.35 months (16-126 m). 63.3% patients were ASA 1 or 2 and 41.9% were smokers. 77.9% of patients had some comorbidity. Anterior approach surgeries were 65.7%. Perioperative complications: 29% medical, 8.9% intraoperative and 3% implant related. US rate was 2.6%. Causes for revision were postoperative infection or deep hematomas. After bivariate analysis, the risk factors associated were diabetes mellitus (OR 2.6; 95% CI 1-5.5) and intraoperative complications (OR 6.5, 95% CI 1-40). The presence of US does not have influence in satisfaction using GOS score.ConclusionsOur US rate was 2.6%, similar to the literature. Diabetics and patients suffering an intraoperative complication are more likely to need an early reinterventions (OR 2.2 and 6.5, respectively). US did not alter the patient's outcomes. These slides can be retrieved under Electronic Supplementary Material.

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