Association of MOS-Based Blast Exposure With Medical Outcomes

Area of Science:

• Military medicine
• Occupational health
• Neuroscience

Background:

• Assessing health effects of repeated low-level blast exposure in military occupations is challenging due to subtle, incremental impacts.
• Gross effects are typically addressed through training modifications, necessitating focus on less apparent outcomes.
• Individual susceptibility and exposure history significantly influence potential health consequences.

Purpose of the Study:

• To investigate medical records for clinically significant blast-associated effects in service members.
• To test the hypothesis that occupationally blast-exposed populations exhibit poorer global medical outcomes.
• To identify potential near-term opportunities for reducing neurosensory risks.

Main Methods:

• Comparative analysis of medical records from 50,254 service members in high-blast-exposure MOSs versus 50,254 in lower-exposure MOSs.
• Evaluation of hospitalizations, outpatient visits, pharmacy records, and disability ratings.
• Statistical analysis using adjusted risk ratios to compare outcomes between groups.

Main Results:

• Blast-exposed MOSs showed a significantly higher risk for ambulatory encounters for tinnitus (adjusted risk ratios ranging from 1.19 to 1.31).
• Other hypothesized neurological outcomes were less pronounced and linked to acute exposures.
• The study confirms increased risk for neurosensory conditions in occupations with repeated blast exposure.

Conclusions:

• Service members in blast-exposed occupations face an elevated risk for neurosensory conditions, particularly tinnitus.
• Some occupational blast-related health risks may not be evident in current medical systems or standard care.
• Findings suggest opportunities to mitigate neurosensory risks for exposed service members.