Increased annual trauma volumes per EMS clinician significantly lower early mortality in severely injured patients.

• For every 5 additional adult trauma patients annually, 6-hour mortality decreases by 10% (adjusted odds ratio 0.899).
• A 2.6% reduction in in-hospital mortality is also observed with increased volume (aor 0.974).

Consider optimizing EMS staffing and training to improve early outcomes.

• Decreased scene time is associated with higher clinician volumes, enhancing patient care efficiency.