Evidence map›Paper›PMID 29237604›Full record

ArticleBMJ (Clinical research ed.)2017

Stormy weather: a retrospective analysis of demand for emergency medical services during epidemic thunderstorm asthma.

Emily Andrew, Ziad Nehme, Stephen Bernard, Michael J Abramson, Ed Newbigin, Ben Piper, Justin Dunlop, Paul Holman, Karen Smith

Open access · hybridAbstract read
In one paragraph

Article in BMJ (Clinical research ed.), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 3 pooled it
4.8field-weighted citation impact, top 4% of its field
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

27 citing papers in PubMed, 3 syntheses or guidelines pooled it, 74 citations in OpenAlex.

  1. Pooled it
  2. Thunderstorm Asthma Epidemic-A Systematic Review of the General Practice Perspective.International journal of environmental research and public health · 2020
    Pooled it
  3. Pooled it
  4. Review
  5. Article
  6. Article
  7. Climate change and epigenetic biomarkers in allergic and airway diseases.The Journal of allergy and clinical immunology · 2023
    Review
  8. Article
  9. Review
  10. A Review of the Respiratory Health Burden Attributable to Short-Term Exposure to Pollen.International journal of environmental research and public health · 2022
    Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Exposure Assessment for Tropical Cyclone Epidemiology.Current environmental health reports · 2022
    Review
  16. Observational
  17. Review
  18. Article
  19. Thunderstorm allergy and asthma: state of the art.Multidisciplinary respiratory medicine · 2021
    Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 4 institutions in 1 country.

Emily AndrewCentre for Research and Evaluation, Ambulance Victoria, Doncaster, VIC 3108, Australia 3108 emily.andrew@ambulance.vic.gov.au.
Ziad NehmeCentre for Research and Evaluation, Ambulance Victoria, Doncaster, VIC 3108, Australia 3108.
Stephen BernardCentre for Research and Evaluation, Ambulance Victoria, Doncaster, VIC 3108, Australia 3108.
Michael J AbramsonDepartment of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC 3004, Australia.
Ed NewbiginSchool of BioSciences, University of Melbourne, Melbourne, VIC 3052, Australia.
Ben PiperEmergency Services Telecommunications Authority, Burwood East, VIC 3151, Australia 3151.
Justin DunlopEmergency Management Unit, Ambulance Victoria, Melbourne, VIC 3000, Australia.
Paul HolmanEmergency Management Unit, Ambulance Victoria, Melbourne, VIC 3000, Australia.
Karen SmithCentre for Research and Evaluation, Ambulance Victoria, Doncaster, VIC 3108, Australia 3108.
Monash University · AUAmbulance Victoria · AUServices Australia · AUUniversity of Melbourne · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo describe the demand for emergency medical assistance during the largest outbreak of thunderstorm asthma reported globally, which occurred on 21 November 2016.

designA time series analysis was conducted of emergency medical service caseload between 1 January 2015 and 31 December 2016. Demand during the thunderstorm asthma event was compared to historical trends for the overall population and across specific subgroups.

settingVictoria, Australia.

main outcome measuresNumber of overall cases attended by emergency medical services, and within patient subgroups.

resultsOn 21 November 2016, the emergency medical service received calls for 2954 cases, which was 1014 more cases than the average over the historical period. Between 6 pm and midnight, calls for 1326 cases were received, which was 2.5 times higher than expected. A total of 332 patients were assessed by paramedics as having acute respiratory distress on 21 November, compared with a daily average of 52 during the historical period. After adjustment for temporal trends, thunderstorm asthma was associated with a 42% (95% confidence interval 40% to 44%) increase in overall caseload for the emergency medical service and a 432% increase in emergency medical attendances for acute respiratory distress symptoms. Emergency transports to hospital increased by 17% (16% to 19%) and time critical referrals from general practitioners increased by 47% (21% to 80%). Large increases in demand were seen among patients with a history of asthma and bronchodilator use. The incidence of out-of-hospital cardiac arrest increased by 82% (67% to 99%) and pre-hospital deaths by 41% (29% to 55%).

conclusionsAn unprecedented outbreak of thunderstorm asthma was associated with substantial increase in demand for emergency medical services and pre-hospital cardiac arrest. The health impact of future events may be minimised through use of preventive measures by patients and predictive early warning systems.

Indexed as

AdolescentAdultAgedAsthmaAustraliaChildChild, PreschoolDisease OutbreaksEmergency Medical ServicesFemaleHealth Services Needs and DemandHumansInfantMaleMiddle AgedRetrospective Studies

Identifiers

PMID29237604
PMCPMC5727436
OpenAlexW2772230228

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

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.