Background: Some hospitals attend to great number of patients who come from nursing homes whose median age, seriousness of illness and comorbidity differ of these patients from those of non-institutionalized patients. This can partly modify and thereby affect some of the parameters used to measure "assistance quality".
Materials And Methods: The data related to the demographic, clinical factors, severity criteria and mortality, were studied in patients hospitalized in two Internal Medicine Services during 2005-6 on the basis of whether they arrived from a nursing home or not.