DehydrationNCT06442969
Implementing an Intervention to Reduce Heat Stress and Chemical Exposures
A study testing Education and resources provided by community health workers in people with Dehydration and Heat Stress, run by San Diego State University at 1 site in United States.
Trial summary
The investigators are studying the dangers that farmworkers face while working in the fields and at home. The investigators goals are: 1. Measure how much heat and chemicals farmworkers in Imperial County are exposed to. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Dehydration, Heat Stress
- What is being tested?
- Education and resources provided by community health workers
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 60 participants
- Where
- 1 siteUnited States
- Study dates
- 7 Jun 2024to 15 Dec 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Currently living in Imperial County, California, USA
- Currently work in agriculture
- Plan on living in Imperial Valley for the next 6 months
Who cannot join
- Not currently living in Imperial County, California, USA
- Not currently working in agriculture
- Not planning to live in Imperial Valley for the next 6 months
Trial locations and contacts
1 site in 1 country.
United States1 site
Lideres Campesinas Imperial
El Centro, California, 92243
About this study
The investigators are studying the dangers that farmworkers face while working in the fields and at home. The investigators goals are:
- Measure how much heat and chemicals farmworkers in Imperial County are exposed to. The investigators will ask the participants to wear a special belt under their clothes during work to measure heat. The investigators will also put two small temperature monitors in the participant's home for a day. The investigators will collect a urine sample to check hydration, and also measure the participants height, weight, blood pressure, and some blood markers for diseases using a simple finger-prick test. To measure chemicals, the investigators will give the participants a wristband to wear for a week and hang another in the participants home. The investigators will also collect dust from each participant's home with a vacuum. Then, the investigators will analyze everything at San Diego State University. After collecting samples, a trained community health worker will ask the participants a few questions about their work, lifestyle, health symptoms, and any hazards they face. The investigators will meet the participants twice at their homes to distribute the tools which will later be collected. Once the tools are collected, the investigators will have the chance to follow up with the participants if they have any questions.
- Provide help to lower heat and chemical exposure with the help of community health workers.
- Measure heat and chemicals again using the same methods to see if the project made a difference.
- Talk to participants about what they liked and how the investigators can make future projects better.
- Conditions
- Dehydration, Heat Stress
- Being tested
- Education and resources provided by community health workers
- Keywords
- Farm worker, Heat exposure, Chemical exposure, Agricultural worker, Take-home exposure
- Medical subject headings
- Dehydration, Heat Stress Disorders
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Education and resources provided by community health workersOther
The intervention will consist of implementing existing tools provided by EPA's Design for the Environment program, CalOSHA and NIOSH sector-specific guidance for agricultural workers, the Imperial County Department of Public Health and materials from California Department of Toxics Substances Control. The investigators will utilize and adjust existing educational tools such as the Heat Illness Prevention plan developed by CalOSHA. In addition to the educational materials, the investigators will give each farmworker cooling working gear to be worn during their work-shift with (specialized clothes that has been used in other occupational settings). The investigators will provide all participants with a low-cost fan filter, known as Corsi-Rosenthal box built jointly by the community health/research team to reduce chemicals at home, and a small A/C unit to reduce heat stress.
| Study group | Role | What they receive |
|---|---|---|
| All participants | Other | All participants will receive the intervention Receives: Other: Education and resources provided by community health workers |
What is being measured
The primary outcome is the main question the study is designed to answer.
Individual heat stress
Skin temperature in degrees Celsius derived from skin temperature monitor worn against the participant's skin.
Measured: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Participant household temperature
Household temperature in degrees Celsius, derived from weather monitor placed in the participant's home.
Measured: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Participant hydration level
Specific gravity of participant's urine
Measured: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Concentration of chemicals measured in silicon wristband worn by study participant
Participants will be asked to wear a silicon wristbands twice; once at baseline and again after the intervention. The research team will collect the wristbands and transport them to San Diego State University for analysis of different classes of chemicals, including pesticides, organophosphates, pyrethroids, and legacy pollutants. The chemicals adhered to the wristbands will be extracted in ethyl acetate and then passed through a solid-phase extraction. Extracts will be analyzed using a two-dimensional gas chromatography coupled to time-of-flight mass spectrometry at San Diego State University. The final concentration of each chemical will be expressed as nanograms per gram of wristband.
Measured: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Concentration of chemicals measured in silicon wristbands hung in the participant's household.
Silicon wristbands will be hung in participants' homes twice; once at baseline and again after the intervention. The research team will collect the wristbands and transport them to San Diego State University for analysis of different classes of chemicals, including pesticides, organophosphates, pyrethroids, and legacy pollutants. The chemicals adhered to the wristbands will be extracted in ethyl acetate and then passed through a solid-phase extraction. Extracts will be analyzed using a two-dimensional gas chromatography coupled to time-of-flight mass spectrometry at San Diego State University. The final concentration of each chemical will be expressed as nanograms per gram of wristband.
Measured: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Concentration of chemicals measured in participant's household dust collected with a vacuum
The research team will visit the participant's home twice to collect the dust samples of the living area using a vacuum; once at baseline and again after the intervention. After collection, the research team will transport the dust samples to San Diego State University to measure the concentrations of different classes of chemicals, including pesticides, organophosphates, pyrethroids, and legacy pollutants. The chemicals in the dust will be extracted in ethyl acetate and then passed through a solid-phase extraction. Extracts will be analyzed using a two-dimensional gas chromatography coupled to time-of-flight mass spectrometry at San Diego State University. The final concentration of each chemical will be expressed as nanograms per gram of dust.
Measured: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Jun 2024
- Study start7 Jun 2024
- Primary completion15 Dec 2025
- Study completion15 Dec 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for DehydrationStudies of the same condition, open and under way.
- More trials run by San Diego State UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 60 participants (actual)
Sponsor and investigators
- Lead sponsor
- San Diego State University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06442969
- Sponsor's protocol ID
- HS-2024-0081
- Status last verified
- Apr 2026
- First submitted
- 13 May 2024
- Last updated
- 16 Apr 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 16 Apr 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Implementing an Intervention to Reduce Heat Stress and Chemical Exposures
- ClinicalTrials.gov ID
- NCT06442969
- Acronym / sponsor ID
- HS-2024-0081
- Conditions
- Dehydration, Heat Stress
- Keywords
- Farm worker, Heat exposure, Chemical exposure, Agricultural worker, Take-home exposure
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 60 participants (actual)
- Lead sponsor
- San Diego State UniversityUniversity, hospital or other
- Study start
- 7 Jun 2024 (actual)
- Primary completion
- 15 Dec 2025 (actual)
- Study completion
- 15 Dec 2025 (actual)
- First posted
- 5 Jun 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The investigators are studying the dangers that farmworkers face while working in the fields and at home. The investigators goals are:
- Measure how much heat and chemicals farmworkers in Imperial County are exposed to. The investigators will ask the participants to wear a special belt under their clothes during work to measure heat. The investigators will also put two small temperature monitors in the participant's home for a day. The investigators will collect a urine sample to check hydration, and also measure the participants height, weight, blood pressure, and some blood markers for diseases using a simple finger-prick test. To measure chemicals, the investigators will give the participants a wristband to wear for a week and hang another in the participants home. The investigators will also collect dust from each participant's home with a vacuum. Then, the investigators will analyze everything at San Diego State University. After collecting samples, a trained community health worker will ask the participants a few questions about their work, lifestyle, health symptoms, and any hazards they face. The investigators will meet the participants twice at their homes to distribute the tools which will later be collected. Once the tools are collected, the investigators will have the chance to follow up with the participants if they have any questions.
- Provide help to lower heat and chemical exposure with the help of community health workers.
- Measure heat and chemicals again using the same methods to see if the project made a difference.
- Talk to participants about what they liked and how the investigators can make future projects better.
Study design
- Primary purpose
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| All participants | Other | Other: Education and resources provided by community health workersAll participants will receive the intervention |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- Currently living in Imperial County, California, USA
- Currently work in agriculture
- Plan on living in Imperial Valley for the next 6 months
Key exclusion criteria (3 listed)
- Not currently living in Imperial County, California, USA
- Not currently working in agriculture
- Not planning to live in Imperial Valley for the next 6 months
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Education and resources provided by community health workersThe intervention will consist of implementing existing tools provided by EPA's Design for the Environment program, CalOSHA and NIOSH sector-specific guidance for agricultural workers, the Imperial County Department of Public Health and materials from California Department of Toxics Substances Control. The investigators will utilize and adjust existing educational tools such as the Heat Illness Prevention plan developed by CalOSHA. In addition to the educational materials, the investigators will give each farmworker cooling working gear to be worn during their work-shift with (specialized clothes that has been used in other occupational settings). The investigators will provide all participants with a low-cost fan filter, known as Corsi-Rosenthal box built jointly by the community health/research team to reduce chemicals at home, and a small A/C unit to reduce heat stress. | Other | All participants |
Primary outcome
Individual heat stress
Time frame: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Skin temperature in degrees Celsius derived from skin temperature monitor worn against the participant's skin.
Participant household temperature
Time frame: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Household temperature in degrees Celsius, derived from weather monitor placed in the participant's home.
Participant hydration level
Time frame: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Specific gravity of participant's urine
Concentration of chemicals measured in silicon wristband worn by study participant
Time frame: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Participants will be asked to wear a silicon wristbands twice; once at baseline and again after the intervention. The research team will collect the wristbands and transport them to San Diego State University for analysis of different classes of chemicals, including pesticides, organophosphates, pyrethroids, and legacy pollutants. The chemicals adhered to the wristbands will be extracted in ethyl acetate and then passed through a solid-phase extraction. Extracts will be analyzed using a two-dimensional gas chromatography coupled to time-of-flight mass spectrometry at San Diego State University. The final concentration of each chemical will be expressed as nanograms per gram of wristband.
Concentration of chemicals measured in silicon wristbands hung in the participant's household.
Time frame: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Silicon wristbands will be hung in participants' homes twice; once at baseline and again after the intervention. The research team will collect the wristbands and transport them to San Diego State University for analysis of different classes of chemicals, including pesticides, organophosphates, pyrethroids, and legacy pollutants. The chemicals adhered to the wristbands will be extracted in ethyl acetate and then passed through a solid-phase extraction. Extracts will be analyzed using a two-dimensional gas chromatography coupled to time-of-flight mass spectrometry at San Diego State University. The final concentration of each chemical will be expressed as nanograms per gram of wristband.
Concentration of chemicals measured in participant's household dust collected with a vacuum
Time frame: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
The research team will visit the participant's home twice to collect the dust samples of the living area using a vacuum; once at baseline and again after the intervention. After collection, the research team will transport the dust samples to San Diego State University to measure the concentrations of different classes of chemicals, including pesticides, organophosphates, pyrethroids, and legacy pollutants. The chemicals in the dust will be extracted in ethyl acetate and then passed through a solid-phase extraction. Extracts will be analyzed using a two-dimensional gas chromatography coupled to time-of-flight mass spectrometry at San Diego State University. The final concentration of each chemical will be expressed as nanograms per gram of dust.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Apr 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Education and resources provided by community health workers in people with Dehydration and Heat Stress, run by San Diego State University at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 16 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Individual heat stress (time frame: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention). The study lists 6 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Apr 2026.