Lifestyle-related Condition Clinical Trial
Official title:
Dietary Quality Photo Navigation: A Preliminary Biomarker Validation Study and Comparison With a Food Frequency Questionnaire
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.
The primary aim is to test thee principal hypotheses (n=150):
1. 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.
2. 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.
3. 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.
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