• H C Bock, W H Cordell, A C Hawk, and G E Bowdish.
• Emergency Medicine and Trauma Center, Methodist Hospital of Indiana, Indianapolis.
• Ann Emerg Med. 1992 Oct 1;21(10):1204-7.

BackgroundThe Indianapolis 500 Mile Race, the largest single-day, single-venue sporting event in the world, is attended by an estimated 400,000 people. Major illness and injury are treated at the Hanna Emergency Medical Center, the track hospital. Minor illness is treated at ten outlying aid stations.PurposeWe describe the demographics of emergency medical care at the Hanna Emergency Medical Center.DesignDescriptive.MethodsPatient care data for patients treated at the medical center are first recorded on paper charts and then coded and transferred to computer. Data regarding patients treated at the medical center during eight consecutive races (1983-1990) were analyzed. Frequency of treatment and medical cardiac arrest rates were calculated. Aid station data and medical center records from nonrace days were not analyzed.ResultsThe average number of patients treated per year at the track hospital was 139. The total number treated over the eight-year period was 1,113, yielding a frequency of treatment of 0.35 per 1,000. Analysis showed 16.2% of the proprietary treatment codes involved intoxication; 15.4%, lacerations (other than feet); 11.0%, pre-existing conditions; and 8.5%, heat illness. During the eight years, there were four medical cardiac arrests (incidence of 0.0125 per 10,000 spectators), all resulting in death. A fifth spectator died after being struck by a wheel from a race car. There were no driver deaths on race day.ConclusionDescriptive data regarding medical care of crowds may be useful to emergency specialists who must staff, order supplies, and plan treatment facilities for similar mass gatherings. It is evident from this and other mass-gathering studies that there is a need for consistency in nomenclature and data collection. This will allow more accurate comparisons of emergency medical care between venues.

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