At a glance
ClinicalIndex Comparison RecordStandardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.
Validation of a Lutein and Zeaxanthin Food Frequency Questionnaire, and an Electronic Device Use Questionnaire.
In Brief
An observational study evaluating Weekly Food Frequency Questionnaire, Monthly Food Frequency Questionnaire, and 3 other interventions for Lutein and Zeaxanthin Dietary Intake and 3 related conditions. Completed, enrolled 183 participants across 1 site.
Detailed Summary
Tools to investigate dietary lutein and zeaxanthin (L/Z) intake and electronic device (ED) use are important to progress research that investigates the role of ED blue light (BL) exposure, and dietary L/Z intake on macular health. This project aims to validate two questionnaires developed by our research group: The L/Z FFQ, and the Electronic Device Use Questionnaire (EDUQ). The L/Z FFQ aims to investigate dietary intake of L/Z over the prior week or month. The EDUQ aims to investigate usual hours and behaviours surrounding ED use over the prior three months. This aims of this project are to: 1. Validate a L/Z FFQ recalling over a weekly and monthly timeframe against multiple 24-hour diet recalls over four weeks. 2. Validate the EDUQ against multiple 24-hour ED use diaries over eight weeks. A cohort of 100 adults will be invited to participate to validate the FFQ and EDUQ. Participants will be offered to choose to participate in one or both the questionnaire validations (L/Z FFQ and EDUQ).
Study Details
Timeline
Interventions
A purpose designed 91-item questionnaire to measure frequency of consumption of a selection of L/Z containing foods over the prior 7 days.
A purpose designed 95-item questionnaire completed at visit 1 to measure frequency of consumption of a selection of L/Z containing foods over the prior month.
the diet recall via the online Automated Self-Administered 24-Hour Dietary Assessment Tool (ASA24®) takes approximately 25 minutes to complete, and investigates food and beverages consumed in the prior 24-hours.
1\. The EDUQ: A 22-item questionnaire that takes 20 minutes to complete, and measures participant demographic information (weight, height, age, highest level of education, occupational status, post-code and country of residence), usual daily ED use from present up to 20 years ago, occupational influence to use, and differences to ED use between a weekend and weekday.
Participants asked to record their electronic device use in hours and minutes over 24 hours.