Chronic StressNCT07265648
Assessing Diet, Stress Scores, and Other Health Metrics in Healthy Northern California Adults
An observational study of Chronic Stress and Stool Frequency, run by USDA, Western Human Nutrition Research Center at 1 site in United States.
Trial summary
The purpose of this study is to gather health and nutrition data from the population of Davis, CA and surrounding areas. This data will be used to help us test and improve our study procedures for a larger planned study on peanut consumption and effects on cardiovascular disease (CVD) risk. Read more about this study
- Who is it for?
- Ages 18 to 65 yearsHealthy volunteers can take part
- Conditions the study is for
- Chronic Stress, Stool Frequency, Food Allergies
- What is being tested?
- Online Survey
- How many people
- 300 participants
- Where
- 1 siteUnited States
- Study dates
- 8 Dec 2025to 20 Jan 2026
- Phase
- Observational
- 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 to 65 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Adults 18-65 years old, currently living in Yolo, Sacramento, Solano, Sutter, or Placer counties
Who may be able to join
- Adults 18-65 years old
- Currently living in Yolo, Sacramento, Solano, Sutter, or Placer counties
- Able to complete an online survey written in English, on mobile phone, tablet, or computer
Who cannot join
- Previous participation in the study
Trial locations and contacts
1 site in 1 country.
United States1 site
USDA Western Human Nutrition Research Center
Davis, California, 95616
About this study
Official title: Characterization, Perceived Stress Scores, Nut Consumption and Bowel Patterns of a Healthy Adult Population in Northern California: A Pilot Study
The purpose of this study is to gather health and nutrition data from the population of Davis, CA and surrounding areas. This data will be used to help us test and improve our study procedures for a larger planned study on peanut consumption and effects on cardiovascular disease (CVD) risk.
Read the detailed description
Participants will be recruited to complete an online survey asking questions about their stress levels, nut consumption, bowel patterns, body measurements, and county of residence. This data will be used to gain insight into the characteristics of this population.
- Conditions
- Chronic Stress, Stool Frequency, Food Allergies, Diet Surveys, Demographic Data
- Being tested
- Online Survey
- Keywords
- Survey, Observational Study, Online Survey, Stress, Diet, allergens
- Medical subject headings
- Food Hypersensitivity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Online SurveyOther
Online survey containing a Perceived Stress Score - 4 instrument, a modified food frequency questionnaire, and will measure reported age, sex, geographical location, usage of prescription medications, food allergies, and stool frequency and consistency.
| Study group | Role | What they receive |
|---|---|---|
| Adults living in and around Davis, CA | Adults 18-65 years old, currently living in Yolo, Sacramento, Solano, Sutter, or Placer counties Receives: Other: Online Survey |
What is being measured
The primary outcome is the main question the study is designed to answer.
Perceived Stress Score
Measured using a validated tool for assessing perceived psychosocial stress within the last month, the Perceived Stress Scale 4 (PSS-4). Participants will report their answers to 4 questions in frequencies ranging from "Never" to "Very Often" on a 5 point scale
Measured: Baseline
Nut Consumption Frequency and Quantity
Participants will input frequencies of nut and nut butter consumption and amounts of nuts and nut butter consumed in a typical month, using a modified food frequency questionnaire. Frequency will be reported as values ranging from "Never" to "6 or more times a week". Nut and nut butter consumption will be reported in cups and tablespoons
Measured: Baseline
Secondary outcomes (9)
Consumption Frequency of Nut-Containing Foods
Reported as monthly consumption of nut containing foods (granola, cereal, pastries, breads, or other snacks or sweets) in frequencies ranging from "Never" to "6 or more times per week"
Measured: Baseline
Prevalence of Food Allergies
Reported as allergies to any of 9 common food allergens: (Peanuts, Tree Nuts, Egg, Wheat, Soy, Shellfish, Fish, Sesame, and Milk)
Measured: Baseline
Stool Frequency
Reported as usual number of bowel movements per week
Measured: Baseline
Stool Consistency
Reported using images of Bristol Scale stool types
Measured: Baseline
Body Mass Index (BMI)
Calculated using participant-reported height and weight
Measured: Baseline
Prescription Drug Use
Participants will confirm or deny intake of medications from 6 categories: (Asthma medications, Antibiotics or antivirals, weight loss medications, cholesterol or lipid lowering medications, blood pressure medications, or psychiatric medications)
Measured: Baseline
Age
Reported as age in years
Measured: Baseline
Biological Sex
Reported as sex assigned at birth
Measured: Baseline
Geographic Data
Reported as current county of residence
Measured: Baseline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Dec 2025
- Study start8 Dec 2025
- Primary completion20 Jan 2026
- Study completion20 Jan 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Chronic StressStudies of the same condition, open and under way.
- 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
- Observational
- Observational model
- Other
- Time perspective
- Cross-sectional
- Enrolment
- 300 participants (actual)
Sponsor and investigators
- Lead sponsor
- USDA, Western Human Nutrition Research Center
- Sponsor type
- US federal agency
- Responsible party
- Sponsor
- Investigators
- Ryan Snodgrass, PhD, Principal investigator, United States Department of Agriculture - Western Human Nutrition Research Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07265648
- Sponsor's protocol ID
- 2337131
- Status last verified
- Jan 2026
- First submitted
- 20 Nov 2025
- Last updated
- 29 Jan 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 29 Jan 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Characterization, Perceived Stress Scores, Nut Consumption and Bowel Patterns of a Healthy Adult Population in Northern California: A Pilot Study
- ClinicalTrials.gov ID
- NCT07265648
- Acronym / sponsor ID
- 2337131
- Conditions
- Chronic Stress, Stool Frequency, Food Allergies, Diet Surveys, Demographic Data
- Keywords
- Survey, Observational Study, Online Survey, Stress, Diet, allergens
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 300 participants (actual)
- Lead sponsor
- USDA, Western Human Nutrition Research CenterUS federal agency
- Study start
- 8 Dec 2025 (actual)
- Primary completion
- 20 Jan 2026 (actual)
- Study completion
- 20 Jan 2026 (actual)
- First posted
- 5 Dec 2025 (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 purpose of this study is to gather health and nutrition data from the population of Davis, CA and surrounding areas. This data will be used to help us test and improve our study procedures for a larger planned study on peanut consumption and effects on cardiovascular disease (CVD) risk.
Detailed description
Participants will be recruited to complete an online survey asking questions about their stress levels, nut consumption, bowel patterns, body measurements, and county of residence. This data will be used to gain insight into the characteristics of this population.
Study design
- Observational model
- Other
- Time perspective
- Cross-sectional
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Adults living in and around Davis, CA | – | Other: Online SurveyAdults 18-65 years old, currently living in Yolo, Sacramento, Solano, Sutter, or Placer counties |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Adults 18-65 years old, currently living in Yolo, Sacramento, Solano, Sutter, or Placer counties
Key inclusion criteria (3 listed)
- Adults 18-65 years old
- Currently living in Yolo, Sacramento, Solano, Sutter, or Placer counties
- Able to complete an online survey written in English, on mobile phone, tablet, or computer
Key exclusion criteria (1 listed)
- Previous participation in the study
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 |
|---|---|---|
| Online SurveyOnline survey containing a Perceived Stress Score - 4 instrument, a modified food frequency questionnaire, and will measure reported age, sex, geographical location, usage of prescription medications, food allergies, and stool frequency and consistency. | Other | Adults living in and around Davis, CA |
Primary outcome
Perceived Stress Score
Time frame: Baseline
Measured using a validated tool for assessing perceived psychosocial stress within the last month, the Perceived Stress Scale 4 (PSS-4). Participants will report their answers to 4 questions in frequencies ranging from "Never" to "Very Often" on a 5 point scale
Nut Consumption Frequency and Quantity
Time frame: Baseline
Participants will input frequencies of nut and nut butter consumption and amounts of nuts and nut butter consumed in a typical month, using a modified food frequency questionnaire. Frequency will be reported as values ranging from "Never" to "6 or more times a week". Nut and nut butter consumption will be reported in cups and tablespoons
9 secondary outcomes
Consumption Frequency of Nut-Containing Foods
Time frame: Baseline
Prevalence of Food Allergies
Time frame: Baseline
Stool Frequency
Time frame: Baseline
Stool Consistency
Time frame: Baseline
Body Mass Index (BMI)
Time frame: Baseline
Prescription Drug Use
Time frame: Baseline
Age
Time frame: Baseline
Biological Sex
Time frame: Baseline
Geographic Data
Time frame: Baseline
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 29 Jan 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.
Ryan Snodgrass, PhD principal investigator
United States Department of Agriculture - Western Human Nutrition Research Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Chronic Stress and Stool Frequency, run by USDA, Western Human Nutrition Research Center 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 1 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 29 Jan 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?
Perceived Stress Score (time frame: Baseline). The study lists 2 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 29 Jan 2026.