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Update: Exertional hyponatremia, active component, U.S. Armed Forces, 2006-2021
MSMR
|May 24, 2022
Summary
Exertional hyponatremia diagnoses in service members occurred at a rate of 7.8 per 100,000 person-years. Higher incidence was observed in females, younger individuals, and recruits, with varying rates across military branches and demographics.
Area of Science:
- Military Medicine
- Environmental Health
- Sports Medicine
Background:
- Exertional hyponatremia is a serious condition linked to excessive water intake during physical activity.
- Understanding incidence trends and risk factors is crucial for prevention in active populations.
Purpose of the Study:
- To analyze the incidence and trends of exertional hyponatremia among active component service members from 2006 to 2021.
- To identify demographic and military-specific risk factors associated with exertional hyponatremia.
Main Methods:
- Retrospective analysis of incident diagnoses of exertional hyponatremia.
- Surveillance data from active component service members between 2006 and 2021.
- Calculation of crude incidence rates per 100,000 person-years.
Main Results:
- A total of 1,669 diagnoses were recorded, with an overall incidence rate of 7.8 per 100,000 person-years.
- Higher incidence rates were found in female, younger (<20 years), and recruit service members.
- Incidence varied by military branch (highest in Marine Corps) and ethnicity (highest in non-Hispanic White service members).
- Rates peaked in 2010, decreased by 2013, and fluctuated thereafter, with a notable increase in 2020.
Conclusions:
- Exertional hyponatremia poses a significant risk to active service members, particularly specific demographic groups.
- Awareness of excessive water consumption dangers and intake limits is essential for service members and leaders.
- Targeted prevention strategies may be needed for high-risk populations and during periods of increased incidence.
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