Validation of a Food Frequency Questionnaire: VioScreen

Study Overview
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Brief Summary
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The purpose of this study is to learn more about how well a questionnaire about food intake works. The study team will compare questionnaire responses to several other measurements of food intake. There is a special emphasis on fruit and vegetable intake.

Official Title
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Validation of a Food Frequency Questionnaire: VioScreen

Conditions
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Not Determined

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age 18-40 as we are aiming to recruit women of child-bearing age Pregnant women up to 26 weeks' gestation Women assigned female sex at birth who are not pregnant Exclusion Criteria: Women below the age of 18 or over the age of 40 years Pregnant women more than 26 weeks' gestation at the time of enrollment Women who are experiencing limited or reduced food intake related to nausea will not be approached for recruitment and are considered ineligible Women who are unwilling to participate in the study due to time commitment or other reasons Women whose capacity for study compliance is diminished due to conditions such as active untreated substance use disorder, untreated/uncontrolled schizophrenia, bipolar disorder, active psychosis will not be approached for recruitment and are considered ineligible

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Concurrent validity of VioScreen against 24-hour recalls | Concurrent validity measures how a new test compares against a validated test, called the criterion or gold standard. | 6 weeks | 
| Test-retest reliability of VioScreen | Test-retest reliability is a measure of reliability obtained by administering the same test twice over a period of time to a group of individuals. | one month | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Concurrent validity of VioScreen against Veggie Meter | Concurrent validity measures how a new test compares against a validated test, called the criterion or gold standard. | 6 weeks | 
| Concurrent validity of VioScreen against Fruit and Vegetable Screener | Concurrent validity measures how a new test compares against a validated test, called the criterion or gold standard. | 6 weeks | 
| Test-retest reliability of Veggie Meter | Test-retest reliability is a measure of reliability obtained by administering the same test twice over a period of time to a group of individuals. | one month | 
| Test-retest reliability of Fruit and Vegetable Screener | Test-retest reliability is a measure of reliability obtained by administering the same test twice over a period of time to a group of individuals. | one month | 
| Concurrent validity of Veggie Meter against 24-hour recalls | Concurrent validity measures how a new test compares against a validated test, called the criterion or gold standard. | 6 weeks | 
| Concurrent validity of Fruit and Vegetable Screener against 24-hour recalls | Concurrent validity measures how a new test compares against a validated test, called the criterion or gold standard. | 6 weeks |