• J L Valencia-Martín, J Vicente-Guijarro, D San Jose-Saras, P Moreno-Nunez, A Pardo-Hernández, J M Aranaz-Andrés, and ESHMAD Director Group and external advisers.
• Servicio de Medicina Preventiva y Salud Pública, Hospital Universitario Virgen del Rocío, Sevilla, Spain.
• Eur. J. Clin. Invest. 2022 Jul 31; 52 (12): e13851e13851.

IntroductionAdverse Events (AE) are one of the main problems in healthcare. Therefore, many policies have been developed worldwide to mitigate their impact. The Patient Safety Incident Study in Hospitals in the Community of Madrid (ESHMAD) measures the results of them in the region.MethodsCross-sectional study, conducted in May 2019, in hospitalised patients in 34 public hospitals using the Harvard Medical Practice Study methodology. A logistic regression model was carried out to study the association of the variables with the presence of AE, calibrated and adjusted by patient.ResultsA total of 9,975 patients were included, estimating a prevalence of AE of 11.9%. A higher risk of AE was observed in patients with surgical procedures (OR[CI95%]: 2.15[1.79 to 2.57], vs. absence), in Intensive Care Units (OR[CI95%]: 1.60[1.17 to 2.17], vs. Medical), and in hospitals of medium complexity (OR[CI95%]: 1.45[1.12 to 1.87], vs. low complexity). A 62.6% of AE increased the length of the stay or it was the cause of admission, and 46.9% of AE were considered preventable. In 11.5% of patients with AE, they had contributed to their death.ConclusionsThe prevalence of AE remains similar to the previously estimated in studies developed with the same methodology. AE keep leading to longer hospital stays, contributing to patient's death, showing that it is necessary to put focus on patient safety again. A detailed analysis of these events has enabled the detection of specific areas for improvement according to the type of care, centre, and patient.This article is protected by copyright. All rights reserved.

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