Comparison of I-FFQ and Two Reference Methods

July 3, 2023 updated by: University of Bergen

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

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.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

72

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Norway
      • Bergen, Norway, 5021
        • University of Bergen

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

healthy women aged 18-40 years

Description

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

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Comparison of FFQ with 24-hour recall
Time Frame: One week
Comparison of estimated dietary iodine intake from food-frequency questionnaire (FFQ) with dietary iodine intake from 24-hour recall
One week
Comparison of FFQ with urinary iodine concentration
Time Frame: One week
Comparison of estimated iodine intake from food-frequency questionnaire (FFQ) with urinary iodine concentration (UIC)
One week

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Bergen

Collaborators

National Dairy Council
Institute of Marine Research

Investigators

  • Principal Investigator: Hanne Rosendahl-Riise, PhD, University of Bergen

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

August 10, 2021

Primary Completion (Actual)

January 1, 2022

Study Completion (Actual)

June 15, 2022

Study Registration Dates

First Submitted

March 6, 2023

First Submitted That Met QC Criteria

July 3, 2023

First Posted (Actual)

July 6, 2023

Study Record Updates

Last Update Posted (Actual)

July 6, 2023

Last Update Submitted That Met QC Criteria

July 3, 2023

Last Verified

July 1, 2023

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 2021/232247

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Iodine Deficiency

Clinical Trials on spot urine samples

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Kosovo

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe