Dietary Quality Photo Navigation (DQPN) Preliminary Validation Study

Study Overview
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Brief Summary
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The purpose of this research project is to conduct a preliminary validation study of the Diet Quality Photo Navigation (DQPN) method of dietary intake assessment. In 150 adults, dietary intake as estimated by the DQPN will be compared to dietary intake as estimated by a food frequency questionnaire (FFQ) and with blood levels of fatty acids, folic acid, and beta-carotene as biomarkers of dietary intake.

Detailed Description
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The primary aim is to test thee principal hypotheses (n=150): There will be statistically significant correlations between blood levels of fatty acids/folate/beta-carotene and their corresponding levels of dietary intake as estimated by the DQPN. There will be statistically significant correlations between the DQPN and FFQ methods of dietary intake assessment. This includes individual dietary components as well as overall dietary quality and disease risk assessments. User experience surveys will demonstrate that the DQPN can be completed more quickly and more enjoyably than the FFQ. In addition, investigators will assess whether blood levels of fatty acids/folate/beta-carotene are similarly associated with the DQPN method and the FFQ method, and will measure the test-retest reliability of the DQPN method.

Official Title
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Dietary Quality Photo Navigation: A Preliminary Biomarker Validation Study and Comparison With a Food Frequency Questionnaire

Conditions
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Lifestyle-related Condition, Nutrient; Excess

Intervention / Treatment
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* Diagnostic Test: DQPN Validation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Clinical provider has ordered fasting Boston Heart Fatty Acid Balance and participation in the Boston Heart Lifestyle Program as part of clinical practice. Willing to fill out Food Frequency Questionnaire Willing to complete DQPN Diet IDTM (on-line), and to repeat that 1 week later Willing to complete user experience surveys about each dietary assessment method Exclusion Criteria: Taking fatty acid or vitamin supplements (such as fish oil capsules, or multivitamin tablets) Following a diet outside the capabilities of the DQPN cannot be included in this study. The vast majority of eating styles are within the assessment capabilities of the DQPN (Standard American, Low-fat, Mediterranean, Pescatarian, Flexitarian, Low-carb, DASH, AHA, TLC, MIND, Vegetarian, Vegan, Paleo, Southern).

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

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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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: DQPN Validation<br>We are planning to recruit 150 individuals who are patients in the Boston Heart Lifestyle Program and are already having fatty acids measured as part of clinical care, and ask them to complete the DQPN, FFQ, and a User Experience Questionnaire for each dietary assessment method. | Diagnostic Test: DQPN Validation<br>* We are planning to recruit 150 individuals who are patients in the Boston Heart Lifestyle Program and are already having fatty acids measured as part of clinical care, and ask them to complete the DQPN, FFQ, and a brief User Experience Questionnaire for each dietary assessment method.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Correlation between DQPN results and FFQ results | The primary outcome is the set of correlation coefficients comparing the DQPN results and the FFQ results | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Correlation between DQPN and biomarkers | A secondary outcome is the set of correlation coefficients comparing the DQPN results and the corresponding blood levels of fatty acids, folic acid, and beta-carotene | 6 months | 
| Number of minutes spent completing the DQPN and FFQ | A secondary outcome is the median number of minutes spent completing the DQPN and the FFQ will be compared | 6 months | 
| Correlation between FFQ and biomarkers | A secondary outcome is the set of correlation coefficients comparing the FFQ results and the corresponding blood levels of fatty acids, folic acid, and beta-carotene. | 6 months | 
| Retest reliability for DQPN | A secondary outcome is the test-retest reliability coefficient (tau-equivalent reliability measurement) for the DQPN | 6 months |