NCT05934006

Comparison of I-FFQ and Two Reference Methods

Comparison of a Digital Iodine-specific Food Frequency Questionnaire With 24-hour Recall and Urinary Iodine Concentration

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 72 (actual)
• Sponsor: University of Bergen · Academic / Other
• Sex: Female
• Age: 18 Years – 40 Years
• Healthy volunteers: Accepted

Summary

Mild-to-moderate iodine deficiency remains a problem in many parts of the world, including Norway. Of particular concern are fertile, pregnant, and lactating women. The Norwegian Dairy Council developed a digital iodine-specific food frequency questionnaire (I-FFQ) for the assessment of iodine intake levels, but it has yet to be validated. The main objective was thus to investigate the relative validity of the I-FFQ by comparing estimates of iodine intake obtained from the I-FFQ against a single 24-hour recall (24HR) and urinary iodine concentration (UIC) in fertile women.

Conditions

• Iodine Deficiency

Interventions

Type	Name	Description
BIOLOGICAL	spot urine samples	No intervention, but measurement of urinary iodine concentration by 6 repeated spot urine samples

Timeline

• Start date: 2021-08-10
• Primary completion: 2022-01-01
• Completion: 2022-06-15
• First posted: 2023-07-06
• Last updated: 2023-07-06

Locations

1 site across 1 country: Norway