• Manish N Shah, Jeffrey J Bazarian, E Brooke Lerner, Rollin J Fairbanks, William H Barker, Peggy Auinger, and Bruce Friedman.
• Department of Emergency Medicine, University of Rochester School of Medicine & Dentistry, Rochester, NY, USA. manish.shah@rochester.edu
• Acad Emerg Med. 2007 May 1;14(5):441-7.

ObjectivesTo characterize older adult emergency department (ED) visits arriving by emergency medical services (EMS) and to identify factors associated with those patient visits.MethodsA secondary analysis of the ED component of the 1997-2000 National Hospital Ambulatory Medical Care Survey using logistic regression analyses was conducted. The dependent variable was the modes of arrival (EMS vs. not EMS) to the ED. Independent variables were grouped into four domains: demographic, clinical, system, and service characteristics.ResultsBetween 1997 and 2000, 38% of EMS responses were for patients aged 65 years and older. During that period, 62.2 million older adult ED patient visits occurred; 38% arrived via EMS. The average rate of EMS utilization by older adults was 167/1,000 population per year, more than four times the rate for younger patients (39/1,000 population). Fifty-three percent of EMS responses with transport to an ED for older adults resulted in hospital admission. Factors found to be associated with EMS mode of arrival included demographic (older age and urban residence), clinical (need for more rapid care and circulatory system illnesses), and service (need for procedures).ConclusionsOlder adults account for a large proportion of EMS responses and use EMS at a disproportionately high rate. As the older adult population grows, EMS systems must prepare for the increased volume of older adults by making changes in training, operations, and equipment.

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