Accession Number : ADA621280


Title :   Within-year Exertional Heat Illness Incidence in U.S. Army Soldiers, 2008-2012


Descriptive Note : Final rept. Jan 2008-Dec 2012


Corporate Author : ARMY PUBLIC HEALTH COMMAND ABERDEEN PROVING GROUND MD


Personal Author(s) : DeGroot, David ; Martin, Robyn


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a621280.pdf


Report Date : Jun 2015


Pagination or Media Count : 37


Abstract : The incidence of and risk factors for exertional heat illness (EHI) in the US Army have been well documented. The heat season, when the risk of EHI is highest and application of risk mitigation procedures is mandatory, has been arbitrarily defined as 1 May through 30 September. The proportion of EHI that occur outside of the traditional heat season is unknown. Additionally, it is unknown if the heat season definition is appropriate. Purpose: To determine the proportion of EHI that occur within the traditional definition of the heat season at select US Army installations and to examine whether the heat season definition requires revision, Army-wide or on an installation-specific basis. Methods: The 10 US Army installations with the highest frequency of EHI from 2008-2012 were identified and used for analysis. In- and out-patient EHI data (ICD-9-CM codes 992-992.9, first or second diagnoses only) were obtained from the Defense Medical Surveillance System. The summer heat season was operationally defined as 1 May through 30 September; the proportional distribution of EHI within the heat season, overall and by installation was determined. In order to assess the relation between ambient weather conditions and EHI incidence, weather data were downloaded from the National Centers for Environmental Information website and overlaid with weekly EHI incidence plots. Piecewise segmental regression analysis was conducted in order to determine the beginning and end of the heat season for all locations combined and by individual location. Results: During the investigation period there were 7,827 EHIs, 79% of which occurred during the heat season. However, between locations there was considerable variability in within heat season EHI frequency, ranging from 70.1% at Ft Bragg to 95.3% at Ft Sill. The locations with the greatest EHI frequency were Ft Bragg (n=2,129), Ft Benning (n=1,560), and Ft Jackson (n=1,538).


Descriptors :   *HEAT STRESS(PHYSIOLOGY) , *MILITARY PERSONNEL , DEMOGRAPHY , MILITARY FACILITIES , MILITARY FORCES(UNITED STATES) , MILITARY MEDICINE , PATTERNS , STATISTICAL DATA , WOUNDS AND INJURIES


Subject Categories : Medicine and Medical Research
      Stress Physiology
      Military Forces and Organizations


Distribution Statement : APPROVED FOR PUBLIC RELEASE