Prehospital point-of-care medication burden as a predictor of poor related outcomes in unselected acute diseases.

How prehospital medication predicts patient outcomes is unclear. The aim of this work was to unveil the association between medication burden administration in prehospital care and short, mid, and long-term mortality (2, 30, and 365 day) in unselected acute diseases and to assess the potential of the number of medications administered for short, mid, and long-term mortality prediction. A prospective, multicenter, ambulance-based, cohort study was carried out in adults with unselected acute diseases managed by emergency medical services (EMS). The study was carried out in Spain with 44 ambulances and four hospitals. The principal outcome was cumulative mortality at 2, 30, and 365 days. Epidemiological variables, vital signs, and prehospital medications were collected. Patients were classified into four categories: no medication dispensed in prehospital care, one to two medications, three to four medications, and five or more medications. A total of 6401 patients were selected. The 2-day mortality associated with each group was 0.5%, 1.8%, 6.5%, and 18.8%. The 30-day mortality associated with each group was 3.8%, 6.2%, 13.5%, and 31.9%. The 365-day mortality associated with each group was 11%, 15.3%, 25.2%, and 45.7%. The predictive validity of the number of drugs administered, measured by the area under the curve, was 0.808, 0.720, and 0.660 for 2-, 30-, and 365-day mortality, respectively. Our results showed that prehospital drugs could provide relevant information regarding the mortality prediction of patients. The incorporation of this score could improve the management of high-risk patients by the EMS.