An interventional study of Education and resources provided by community health workers in Dehydration and Heat Stress, sponsored by San Diego State University. Completed at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-04-16.
Sponsored by San Diego State University · Not applicable, Interventional, and Prevention
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.
201 studies on the registry are indexed under Dehydration; 28 are open to participants now.
This study's enrollment of 60 is above the median of 43 across 145 interventional studies indexed under Dehydration.
Browse Dehydration studies →San Diego State University is the lead sponsor of 149 studies on the registry; 43 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
All participants will receive the intervention
Other: Education and resources provided by community health workers
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.
Individual heat stress
Skin temperature in degrees Celsius derived from skin temperature monitor worn against the participant's skin.
Time frame: 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.
Time frame: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Participant hydration level
Specific gravity of participant's urine
Time frame: 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.
Time frame: 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.
Time frame: 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.
Time frame: Assessment at baseline (pre-intervention) and again immediately (week) after the intervention
Plan to share: No
No publications or documents are linked to this record.
Ran from Jun 2024 to primary completion in Dec 2025, 18 months.
Of 65 non-industry interventional studies with no phase under Dehydration, half reached primary completion within 8 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 18. This study's 18 months is above that.
Counting every sponsor, half of 73 studies reached it within 9 months; a quarter within 5 and three quarters within 18.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Apr 2026. You cannot join it, but the record below documents what was studied.
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