Evidence map›Paper›PMID 41633812›Full record

Observational studyEmergency medicine journal : EMJ2026

Helicopter Emergency Medical Services attendance is associated with favourable survival outcomes in major trauma: derivation and internal validation of prediction models in a regional trauma system.

Joanne Griggs, Jenny Harris, Jack Barrett, Scott Clarke, John O'Neill, Leigh Curtis, Malcolm Tunnicliff, Claire Baker, Duncan Bootland, Emma Ream and 2 more

Abstract readObservational Study
PubMed Full text at PMC Publisher
In one paragraph

Observational study in Emergency medicine journal : EMJ, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Helicopter emergency medical services for interfacility transfers: an Italian expert consensus.Scandinavian journal of trauma, resuscitation and emergency medicine · 2026
    Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

Joanne GriggsResearch and Innovation, Air Ambulance Kent Surrey Sussex, Redhill, UK jogriggs@aakss.org.uk.ORCID http://orcid.org/0000-0003-3810-4342
Jenny HarrisSchool of Health Sciences, University of Surrey, Guildford, UK.
Jack BarrettResearch and Innovation, Air Ambulance Kent Surrey Sussex, Redhill, UK.
Scott ClarkeResearch and Innovation, Air Ambulance Kent Surrey Sussex, Redhill, UK.
John O'NeillClinical Governance, Air Ambulance Kent Surrey Sussex, Redhill, UK.
Leigh CurtisAir Ambulance Kent Surrey Sussex, Redhill, UK.
Malcolm TunnicliffClinical Governance, Air Ambulance Kent Surrey Sussex, Redhill, UK.
Claire BakerDyson School of Design Engineering / Imperial-X, Imperial College London, London, UK.
Duncan BootlandMedical Director, Air Ambulance Kent Surrey Sussex, Redhill, UK.
Emma ReamSchool of Health Sciences, University of Surrey, Guildford, UK.
Richard LyonSchool of Health Sciences, University of Surrey, Guildford, UK.
Air Ambulance Charity Kent Surrey Sussex

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSurvival benefit of Helicopter Emergency Medical Services (HEMS) attended major trauma remains inadequately quantified across injury severity. We evaluated HEMS performance and identified predictors of survival.

methodsRetrospective observational analysis of 3225 trauma patients attended by a regional HEMS in South-East England (2013-2022). Survival was assessed using W-statistic (

resultsAmong 2125 patients meeting

conclusionHEMS attendance to major trauma in this regional service was associated with survival exceeding case-mix adjusted predictions, and was most pronounced in severely injured patients. PHEA was associated with survival benefit in low probability patients, supporting the value of advanced pre-hospital interventions.

Indexed as

Air AmbulancesEmergency Medical ServicesWounds and InjuriesAdultAgedEnglandFemaleHumansInjury Severity ScoreLogistic ModelsMaleMiddle AgedRetrospective StudiesSurvival AnalysisModels, StatisticalMortalitypre-hospitalSurvival Analysistrauma

Identifiers

PMID41633812
PMCPMC13151477

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.