An observational study in Chronic Stress, Stool Frequency and Food Allergies, sponsored by USDA, Western Human Nutrition Research Center. Completed at 1 site in United States. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-01-29.
Sponsored by USDA, Western Human Nutrition Research Center · Observational
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.
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.
340 studies on the registry are indexed under Food Hypersensitivity; 85 are open to participants now.
This study's enrollment of 300 is above the median of 147 across 117 observational studies indexed under Food Hypersensitivity.
Browse Food Hypersensitivity studies →USDA, Western Human Nutrition Research Center is the lead sponsor of 53 studies on the registry; 1 is open to participants now.
Counted across the registry records on this site, refreshed daily.
Adults 18-65 years old, currently living in Yolo, Sacramento, Solano, Sutter, or Placer counties
Exclusion Criteria:
Adults 18-65 years old, currently living in Yolo, Sacramento, Solano, Sutter, or Placer counties
Other: Online Survey
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.
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
Time frame: 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
Time frame: Baseline
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"
Time frame: 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)
Time frame: Baseline
Stool Frequency
Reported as usual number of bowel movements per week
Time frame: Baseline
Stool Consistency
Reported using images of Bristol Scale stool types
Time frame: Baseline
Body Mass Index (BMI)
Calculated using participant-reported height and weight
Time frame: 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)
Time frame: Baseline
Age
Reported as age in years
Time frame: Baseline
Biological Sex
Reported as sex assigned at birth
Time frame: Baseline
Geographic Data
Reported as current county of residence
Time frame: Baseline
Plan to share: No
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This study is completed, as verified in Jan 2026. You cannot join it, but the record below documents what was studied.
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USDA, Western Human Nutrition Research Center