low diagnostic and therapeutic complexity, and the stays are estimated initially at <3 days. We assessed age, gender, occupation grade, pathology by RGD, procedures, mortality, number of reentries, and medicament-taking. The data were provided by Clinical Documentation and Pharmacy Services of Virgen del Roci'o Universitary Hospital. Results: The number of admissions was 630, relative to 590 patients. The mean value for age was 75 years, and were predominantly female (59.3%). The mortality rate

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... was 9%. The distributions of attended pathology was: shock and heart failure, 26.6%; angina pectoris, 10.6%; COPD, 11.5%; complicated simple pneumonia, 2.6%; breathing problems (excepting infections, asthma, and COPD) with main complications, 7.8%; uncomplicated heart attack (IM), 1.6%; complicated IM, 2.6%; congestive heart failure and pulse-rate alterations with main complications, 2.6%; and others, 34.4%. The mean value for a stay was 4.3 days, and the percentage of stays longer than 15 days was 5%. These patients had a high consumption of global stay (26.5%).-These populations corresponding to stroke without family support, infected decubiti, retention of secretions and severe deterioration of patients with extenuating social problems. The hospital readmission rate was 3.2%. The resolution efficiency (discharge from hospital plus exitus) was 91.4%. The total cost of medicaments were 40,087e. Conclusions: The Short Stay Unit is a highly productive unit that can be improved by using adaptation admission and has a great potential for growth.