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An App-Based Intervention to Protect Home Care Workers From Heat-Related Health Risks: Protocol for a Randomized

Tiziano Gerosa1, Remo Fortunato2,3,4, Francesca Cellina1

  • 1University of Applied Sciences and Arts of Southern Switzerland, Manno, Switzerland.

Inquiry : a Journal of Medical Care Organization, Provision and Financing
|December 24, 2025
PubMed
Summary
This summary is machine-generated.

This study evaluates the REHEAT app to reduce heatwave risks for home care workers. The app aims to mitigate adverse effects like strain and cognitive decline, promoting worker well-being during extreme heat.

Keywords:
health risksheat waveshome care workersoccupational healthrandomized controlled trial

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Area of Science:

  • Occupational Health
  • Climate Change Adaptation
  • Digital Health Interventions

Background:

  • Climate change increases heatwave frequency and severity, posing significant risks to outdoor and physically demanding workers.
  • Home care workers are particularly vulnerable due to strenuous tasks, patient care demands, travel, and inadequate cooling access.
  • Existing occupational health strategies require adaptation to address escalating climate-related heat stressors.

Purpose of the Study:

  • To causally evaluate the effectiveness of the REHEAT app-based strategy in mitigating adverse heatwave effects on Swiss home care workers.
  • To assess the impact of the intervention on primary outcomes including strain accumulation, cognitive function, emotional distress, sleep quality, and overall health.
  • To provide evidence for developing targeted occupational health interventions and climate change adaptation policies for vulnerable worker populations.

Main Methods:

  • A multicenter, unblinded, randomized controlled trial (RCT) involving 350 home care workers in Switzerland.
  • Participants randomized (1:1) to an intervention group using the REHEAT app or a control group, stratified by sex, age, and location.
  • Monitoring via wearable devices, online questionnaires, diaries, and cognitive tests; analysis using Intention-To-Treat (ITT) and Local Average Treatment Effects (LATE).

Main Results:

  • Recruitment of 350 participants completed; intervention and data collection phases are ongoing.
  • No outcome data have been accessed or analyzed at the time of submission.
  • The study is designed to provide robust real-world effect estimates upon completion.

Conclusions:

  • The REHEAT app intervention holds potential for reducing heat-related occupational health risks among home care workers.
  • Findings will inform the development of effective digital health tools and climate adaptation strategies for vulnerable workforces.
  • This research contributes to safeguarding worker health amidst intensifying climate change impacts.