# Online Validation of Dietary Intake Food Frequency Questionnaire Over Four Weeks, and Electronic Device Use Questionnaire Over Eight Weeks.

> **NCT04779411** · — · COMPLETED · sponsor: **The University of Queensland** · enrollment: 183 (actual)

## Conditions studied

- Lutein and Zeaxanthin Dietary Intake
- Age Related Macular Degeneration
- Blue Light Exposure
- Electronic Device Use

## Interventions

- **OTHER:** Weekly Food Frequency Questionnaire
- **OTHER:** Monthly Food Frequency Questionnaire
- **OTHER:** 24-Hour Diet Recall
- **OTHER:** Electronic Device Use Questionnaire
- **OTHER:** 24-Hour Electronic Device Use Diary

## Key facts

- **NCT ID:** NCT04779411
- **Lead sponsor:** The University of Queensland
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2020-08-18
- **Primary completion:** 2022-10-01
- **Final completion:** 2022-10-01
- **Target enrollment:** 183 (ACTUAL)
- **Last updated:** 2023-05-22


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04779411

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04779411, "Online Validation of Dietary Intake Food Frequency Questionnaire Over Four Weeks, and Electronic Device Use Questionnaire Over Eight Weeks.". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04779411. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*