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The REHEAT app-based intervention reduces adverse effects of heatwaves among Swiss home care workers.

This protocol describes a randomized controlled trial evaluating the REHEAT app intervention for 350 Swiss home care workers. The study aims to causally assess the intervention's effectiveness in reducing strain accumulation, cognitive decline, emotional distress, sleep disruption, and impaired night recovery during heatwaves. No outcome data have been analyzed yet, as the trial is ongoing.

Last updated: Aug 26, 2026•1 RCTs•📖 Read as article →

Evidence Score

Evidence Score42/100
Human RCT★★☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. An App-Based Intervention to Protect Home Care Workers From Heat-Related Health Risks: Protocol for a Randomized Controlled Trial.

observational

Gerosa T, Fortunato R, Cellina F, Ragettli M, Marzorati D, Baldassari A, Levati S, Karabegovic A, Baumann I · Inquiry : a journal of medical care organization, provision and financing (2025)

Participants: N/A
Duration: June to September 2025
Intervention: REHEAT app-based intervention (used from June to September 2025)
Outcome: Strain accumulation, cognitive performance, emotional distress, sleep, night recovery, mental and physical health
Effect Size: N/A
Population: Swiss home care workers (n=350) from Northern and Southern Switzerland

Result:

PubMed: 41437581DOI: 10.1177/00469580251405766

Mechanism Graph

App provides real-time heat risk alerts and guidance
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Workers adjust behavior (e.g., hydration, rest breaks)
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Reduced physiological strain and improved recovery
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Result: Lower adverse health effects during heatwaves

Limitations

  • ⚠Unblinded design may introduce performance bias
  • ⚠No outcome data available yet; results are pending
  • ⚠Generalizability limited to Swiss home care workers

Frequently Asked Questions

What is the REHEAT intervention?▼

REHEAT is an app-based strategy designed to protect home care workers from heat-related health risks by providing real-time alerts and guidance.

How many participants are in this study?▼

The study includes 350 home care workers from Northern and Southern Switzerland.

What outcomes are being measured?▼

Primary outcomes include strain accumulation, cognitive performance, emotional distress, sleep quality, night recovery, and mental and physical health.

When will results be available?▼

The intervention and data collection are ongoing, with no outcome data analyzed yet; results are expected after summer 2025.

Products

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References

  1. 1.Gerosa T, Fortunato R, Cellina F, Ragettli M, Marzorati D, Baldassari A, Levati S, Karabegovic A, Baumann I. "An App-Based Intervention to Protect Home Care Workers From Heat-Related Health Risks: Protocol for a Randomized Controlled Trial.." Inquiry : a journal of medical care organization, provision and financing, 2025. PMID: 41437581 DOI: 10.1177/00469580251405766
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.