• Roberto Fariña-Castro, Cristina Roque-Castellano, Manuel Artiles-Armas, Alicia Conde-Martel, and Joaquín Marchena-Gómez.
• Department of Anesthesiology, Hospital Universitario de Gran Canaria Dr. Negrín, Universidad de Las Palmas de Gran Canaria, Barranco La Ballena s/n., 35012, Las Palmas de Gran Canaria, Las Palmas, Spain.
• J Anesth. 2020 Oct 1; 34 (5): 650-657.

PurposePreoperative assessment at extreme ages would identify patients at a high risk of developing postoperative complications. The objective of this study was to compare the usefulness of different risk scales in a series of nonagenarian surgical patients.MethodsA total of 244 surgical nonagenarians, 148 women (60.7%), median age 91 years (IQR: 90-93), were analysed. The following scales were evaluated: preoperative status (ASA-PS, Charlson Comorbidity Index, Lee Index, Reiss Index, and surgical mortality probability model-S-MPM); intraoperative status (Surgical Apgar Score and SASA score), and, as output variables, surgical outcomes (morbidity measured by the Comprehensive Complication Index-CCI, and death). Univariate analysis and receiver operating characteristic curves (ROC) were performed. Area under ROC curves (AUROC) were evaluated to define the best predictors of poor outcomes.ResultsOperative mortality was 27.0%, and 73.4% presented some type of postoperative complication. Operative mortality was associated with the ASA-PS score (p < 0.001), Reiss Index (p < 0.001), Lee Index (p = 0.010), S-MPM (p < 0.001), Surgical Apgar Score (p < 0.001), SASA score (p < 0.001), and emergency surgery (p < 0.001). Postoperative complications were related to the ASA-PS score (p = 0.001), Reiss Index (p < 0.001), Lee Index (p < 0.001), S-MPM (p < 0.001), Surgical Apgar Score (p < 0.001) and SASA score (p < 0.001). The best predictors of operative mortality and complications were the SASA and Surgical Apgar Score (AUROCs > 0.88).ConclusionAs in the general population, the Surgical Apgar Score and SASA score are the best predictors of operative mortality and morbidity in nonagenarian patients. These risk scales should be considered in the perioperative management of these patients.

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