Helicopter and ground emergency medical services transportation to hospital after major trauma in England: a comparative cohort study.

Trauma Surg Acute Care Open · 2020 · PMC7368476 · PMID 32704546

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did not reach statistical significanceno p-value reported

Our analysis demonstrates a 15% risk-adjusted mortality reduction (OR=0.846; 95% CI 0.684 to 1.046) for a comparable cohort of severely injured patients transported by HEMS versus GEMS; however, this did not reach statistical significance.

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