• Jesús Díez-Manglano, Claudia Palazón-Fraile, Fabiola Diez-Massó, Rosa Martínez-Álvarez, Esther Del Corral-Beamonte, Pilar Carreño-Borrego, Pilar Pueyo-Tejedor, and Javier Gomes-Martín.
• Jesús Díez-Manglano, MD, PhD, is Staff Doctor, Internal Medicine Department, Hospital Royo Villanova, and Main Researcher of the Research Group on Comorbidity and Polypathology, Aragón Health Sciences Institute, Zaragoza, Spain. Esther Del Corral-Beamonte, MD, is Staff Doctor, Internal Medicine Department, Hospital Royo Villanova, Zaragoza, Spain. Claudia Palazón-Fraile, RN, is Staff Nurse; Fabiola Díez-Massó, RN, is Staff Nurse; Rosa Martínez-Álvarez, MD, PhD, is Staff Doctor; Pilar Carreño-Borrego, RN, is Staff Nurse; Pilar Pueyo-Tejedor, RN, is Staff Nurse; Javier Gomes-Martín, MD, is Resident Doctor, Internal Medicine Department, Hospital Royo Villanova, Zaragoza, Spain.
• Nurs Res. 2013 Nov 1;62(6):445-9.

BackgroundDelirium increases mortality and length of stay among hospital inpatients. Little is known about the incidence of delirium among inpatients receiving care in internal medicine nursing units in Spain.ObjectivesThe aim of this study was to estimate frequency of delirium onset among internal medicine inpatients and identify factors associated with delirium onset using nursing records and administrative databases.MethodsRetrospective cohort study of 744 patients hospitalized in an internal medicine department in October 2010 and January, May, and October 2011. Data concerning occurrence of delirium, age, gender, living in a nursing residence, Barthel Index of activities of daily living, Norton scale for pressure ulcer risk, intravenous fluid therapy, urinary catheterization, presence of pressure ulcers, major diagnostic category at discharge, length of stay, and mean weight in the diagnosis-related group were gathered for each patient. Backward stepwise logistic regression was used to identify factors associated with onset of delirium.ResultsNinety-seven (13%) patients experienced delirium. Factors associated with delirium were age (OR = 1.03, 95% CI [1.01, 1.06]), Barthel Index (OR = 0.99. 95% CI [0.98, 0.99]), and urinary catheterization (OR = 2.00, 95% CI [1.19, 3.68]).ConclusionIncreased age and presence of a urinary catheter were associated with increased onset of delirium, whereas higher levels of independence in activities of daily living were protective.

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