Do EMS times associate with injury severity?

Area of Science:

• Traffic Safety Research
• Emergency Medicine
• Injury Epidemiology

Background:

• Understanding factors influencing traffic crash injury severity is crucial for public health.
• Emergency medical services (EMS) response times are a critical component of post-crash care.
• The complex relationship between EMS timing and injury outcomes requires detailed investigation.

Purpose of the Study:

• To identify key factors influencing injury severity in traffic crashes.
• To analyze the impact of emergency medical services (EMS) times on crash injury severity.
• To explore the interaction effects of EMS times and injury location on injury severity.

Main Methods:

• Utilized linked data from police-reported crashes and EMS runs for 2192 hospital-transferred injuries.
• Employed a random-effects ordered probit model to analyze injury severity.
• Developed three models: crash variables only, crash and EMS times, and crash, EMS times, and interaction effects.

Main Results:

• The second model, including EMS times, did not find a significant impact on injury severity.
• The third model revealed that faster EMS response times and slower on-scene times were associated with decreased overall injury severity.
• Specific interaction effects between EMS timing and body injury location were explored.

Conclusions:

• Faster emergency medical services response times, coupled with extended on-scene times, may be linked to reduced injury severity in traffic incidents.
• The findings highlight the nuanced role of different phases of EMS response in mitigating crash outcomes.
• Further research is warranted to elucidate the mechanisms behind these observed associations.