Iodine Deficiency
Conditions
Keywords
validation, food frequency questionnaire
Brief 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.
Interventions
BIOLOGICALspot urine samples
No intervention, but measurement of urinary iodine concentration by 6 repeated spot urine samples
Sponsors
National Dairy Council
Institute of Marine Research
University of Bergen
Study design
Observational model
COHORT
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
FEMALE
Age
18 Years to 40 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Comparison of FFQ with 24-hour recall | One week | Comparison of estimated dietary iodine intake from food-frequency questionnaire (FFQ) with dietary iodine intake from 24-hour recall |
| Comparison of FFQ with urinary iodine concentration | One week | Comparison of estimated iodine intake from food-frequency questionnaire (FFQ) with urinary iodine concentration (UIC) |
Countries
Norway
Outcome results
None listed