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.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
150
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.
Correlation between DQPN results and FFQ results
The primary outcome is the set of correlation coefficients comparing the DQPN results and the FFQ results
Time frame: 6 months
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
Time frame: 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
Time frame: 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.
Time frame: 6 months
Retest reliability for DQPN
A secondary outcome is the test-retest reliability coefficient (tau-equivalent reliability measurement) for the DQPN
Time frame: 6 months
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.