Evidence map›Paper›PMID 39691957›Full record

ArticleAmerican journal of industrial medicine2025

Heat-Related Illness in California Firefighters, 2001-2020.

Margaret Murray, Stella Beckman, Amy Heinzerling, Matthew Frederick, Kristin J Cummings, Sheiphali Gandhi, Robert Harrison

Abstract read
In one paragraph

Article in American journal of industrial medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. 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

7 authors.

Margaret MurrayDivision of Occupational, Environmental, and Climate Medicine, University of California San Francisco, San Francisco, California, USA.ORCID 0000-0003-1745-2778
Stella BeckmanCalifornia Department of Public Health, Occupational Health Branch, Richmond, California, USA.ORCID 0000-0002-7483-6973
Amy HeinzerlingCalifornia Department of Public Health, Occupational Health Branch, Richmond, California, USA.ORCID 0000-0001-8808-3004
Matthew FrederickCalifornia Department of Public Health, Occupational Health Branch, Richmond, California, USA.
Kristin J CummingsCalifornia Department of Public Health, Occupational Health Branch, Richmond, California, USA.ORCID 0000-0002-5422-9199
Sheiphali GandhiDivision of Occupational, Environmental, and Climate Medicine, University of California San Francisco, San Francisco, California, USA.ORCID 0000-0003-3156-7619
Robert HarrisonDivision of Occupational, Environmental, and Climate Medicine, University of California San Francisco, San Francisco, California, USA.

Funding

The authors received no specific funding for this work.
6 · The paper itself

Abstract

backgroundFirefighters have a higher rate of heat-related illness (HRI) compared to other occupations. Given the changing climate, firefighters' risk of occupational HRI merits attention. Therefore, we aimed to identify demographic, temporal, and geographic risk factors associated with occupational HRI in California firefighters between 2001 and 2020.

methodsWithin the California Workers' Compensation Information Systems (WCIS), we identified firefighters from 2001 to 2020 using industry and class codes and assigned occupation titles using the NIOSH Industry and Occupation Computerized Coding system (NIOCCS). HRI claims among firefighters were identified using International Classification of Diseases (ICD) Ninth or Tenth revision codes, WCIS nature and cause of injury codes, and keywords. We calculated HRI incidence rates adjusted by sex, age, year, and county. Estimates of California firefighter employment were obtained from the American Community Survey.

resultsWe identified 2185 firefighter HRI claims between 2001 and 2020 (305.5 claims/100,000 firefighters, 90% CI: 278.7-740.7). Firefighters aged 18 to 29 years had a statistically significant higher risk of HRI compared to those aged 40 to 49 years (rate ratio = 3.5, 90% CI: 3.1-3.9). The HRI rate increased over time, and the risk from 2016 to 2020 was 1.8 times higher than it was from 2001 to 2005 (90% CI: 1.7-1.9). Northern California counties, including Shasta (2313.9) and Sacramento (1772.1), had the highest HRI rates.

conclusionsFirefighters in certain demographic groups and northern California counties were at highest risk of HRI. With rising temperatures and larger wildfires, additional prevention efforts are needed to reduce HRI in California firefighters.

Indexed as

FirefightersHeat Stress DisordersOccupational DiseasesOccupational ExposureAdolescentAdultCaliforniaFemaleHumansIncidenceMaleMiddle AgedRisk FactorsWorkers' CompensationYoung Adult

Identifiers

PMID39691957
PMCPMC11731492

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.