Global Disability Trajectories Over the First Decade Following Combat Concussion

Area of Science:

• Military health research
• Neuroscience
• Public health

Background:

• Traumatic brain injury (TBI) and blast exposure are significant concerns for military personnel.
• Understanding long-term disability trajectories is crucial for effective healthcare and resource allocation.

Purpose of the Study:

• To examine global disability trajectories in US military personnel with and without TBI over a decade post-deployment.
• To identify risk profiles for intervention stratification and reduce long-term healthcare costs.

Main Methods:

• A prospective, observational, longitudinal study followed 475 participants for 10 years.
• Participants were categorized into groups based on combat deployment, blast exposure, and TBI.
• Global disability was measured using the Glasgow Outcome Scale Extended (GOSE).

Main Results:

• Service members with combat concussion (blast-TBI and non-blast-TBI) were 37-49 times more likely to experience worse disability trajectories.
• Even blast-exposed controls showed a 5-fold increased likelihood of worse outcomes compared to non-blast controls.
• These associations remained significant after adjusting for demographic factors and subsequent head injuries.

Conclusions:

• Younger age at injury, lower education, and Army enlistment were associated with higher odds of poor long-term outcomes.
• Identifying at-risk individuals can enable targeted early interventions.
• Findings support strategies to reduce public health costs and enhance quality of life for service members post-deployment.