A Multi-Level Approach to Heat-Related Illness Prevention in Agricultural Workers

May 16, 2022 updated by: June Spector, University of Washington

The project's primary aim is to evaluate the effectiveness of a multi-level heat prevention approach in reducing adverse heat health effects in outdoor agricultural workers

The secondary aims are to:

  • Test the effectiveness of an individual-level training component designed to reduce adverse heat health effects in outdoor agricultural workers
  • Evaluate the effectiveness of a workplace supervisor-level heat awareness application intended to support supervisor decisions to reduce the risk of workers experiencing adverse heat health effects

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

86

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Washington
      • Yakima, Washington, United States, 98902
        • Farms (confidential)

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Speak English or Spanish, live in same dwelling and work at same farm for the season, farm where participant works must agree to collaborate

Exclusion Criteria:

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: PREVENTION
  • Allocation: RANDOMIZED
  • Interventional Model: PARALLEL
  • Masking: NONE

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
ACTIVE_COMPARATOR: HEAT intervention group
Workers in the intervention group will receive the HEAT training, and supervisors in the intervention group will receive the HEAT awareness application and training on how to use it.
Other: Heat Education and Awareness Tools
HEAT training will be delivered to agricultural workers by research staff in this study in the spring. HEAT training uses interactive approaches to engage participants and posters with visuals. Training covers types of heat-related illness and treatments, risk factors, appropriate clothing and hydration, and keeping cool in the home and community. The HEAT awareness application was developed in collaboration with Washington State University's AgWeatherNet Program to notify supervisors signed up for the service about hot weather conditions that might increase the risk for adverse health effects for workers. The HEAT awareness application is designed to allow subscribers to select weather stations of interest and view current heat indices as well as maximum daily heat indices forecasted over the following week. This information is coupled with information about health effects and prevention of adverse heat health effects. Materials are provided in English and Spanish.
NO_INTERVENTION: Comparison group
The comparison group will not be offered HEAT trainings or the HEAT awareness application. They will be offered an alternative training on another topic.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Heat-related Illness Symptoms
Time Frame: Approximately three months
Heat symptoms will be assessed using a short survey conducted in Spanish or English that includes questions about heat-related illness symptoms experienced over the past week. Participants will select one or more symptoms (or select 'none') from a list.
Approximately three months
Heat Strain
Time Frame: Approximately three months
The body's physiological response to heat stress. Core body temperature (degrees C) will be estimated using personal baseline temperature and continuous heart rate during work shifts on several days.
Approximately three months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Pre/post Knowledge Assessment
Time Frame: Approximately three months
Short set of multiple-choice questions based on key points addressed in the one-hour training on recognition, treatment, and prevention of heat-related illness.
Approximately three months
Pre/post Supervisor Survey
Time Frame: Approximately three months
Short set of interview questions to learn about heat safety practices and utilization of the HEAT awareness application for intervention group
Approximately three months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Washington

Collaborators

National Institute for Occupational Safety and Health (NIOSH/CDC)

Investigators

  • Principal Investigator: June T Spector, MD, MPH, University of Washington

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (ACTUAL)

May 22, 2019

Primary Completion (ACTUAL)

August 31, 2021

Study Completion (ACTUAL)

September 30, 2021

Study Registration Dates

First Submitted

January 14, 2020

First Submitted That Met QC Criteria

January 15, 2020

First Posted (ACTUAL)

January 21, 2020

Study Record Updates

Last Update Posted (ACTUAL)

May 17, 2022

Last Update Submitted That Met QC Criteria

May 16, 2022

Last Verified

May 1, 2022

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • STUDY00000238
  • 2U54OH007544-16 (NIH)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

De-identified IPD will be available upon reasonable request and/or will be available in a publicly accessible data repository. IPD will include general demographic variables and summary physiological measurements.

IPD Sharing Time Frame

Data will be available after primary analyses are completed, approximately 1-2 years after data collection is completed. Data will be available indefinitely.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • ANALYTIC_CODE

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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