Comparison of I-FFQ and Two Reference Methods

Iodine Deficiency Clinical Trial

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT05934006
• Other study ID #: 2021/232247
• Status: Completed
• Start date: August 10, 2021
• Est. completion date: June 15, 2022

Study information

• Verified date: July 2023
• Source: University of Bergen
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial 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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 72
• Est. completion date: June 15, 2022
• Est. primary completion date: January 1, 2022
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 18 Years to 40 Years

Eligibility

Inclusion Criteria:

• healthy women aged 18-40 years
• sufficient language skills to be able to complete the questionnaires in Norwegian
• be able to meet physically at the study center in Bergen

Exclusion Criteria:

• being pregnant, lactating, or having known thyroid disease

Related Conditions & MeSH terms

• Iodine Deficiency

Intervention

Biological:
• spot urine samples
No intervention, but measurement of urinary iodine concentration by 6 repeated spot urine samples

Locations

Country	Name	City	State
Norway	University of Bergen	Bergen

Sponsors (3)

Lead Sponsor	Collaborator
University of Bergen	Institute of Marine Research, National Dairy Council

Country where clinical trial is conducted

Norway, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Comparison of FFQ with 24-hour recall	Comparison of estimated dietary iodine intake from food-frequency questionnaire (FFQ) with dietary iodine intake from 24-hour recall	One week
Primary	Comparison of FFQ with urinary iodine concentration	Comparison of estimated iodine intake from food-frequency questionnaire (FFQ) with urinary iodine concentration (UIC)	One week