Adverse events: an expensive and avoidable hospital problem.

The prevalence of AEs was similar to that found in other studies. AEs led to worse patient outcomes and were associated with the patient's death. Although avoidable AEs were less severe, their higher frequency produced a greater impact on the patient and healthcare system.Key messagesAdverse events are one of the main problems in healthcare delivery and patients who suffer from at least one AE are double as likely to die during hospitalization.Avoidable adverse events are the most frequent in health care and they are a good target where achieve improvement areas that allow getting optimal patient safety and quality of care levels.Patients hospitalized in the ICU, with the previous presence of pressure ulcers, central venous catheter, or impaired mobility were associated with the development of avoidable AE, so optimal management of these patients would reduce the impact of AE.