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Completed

NCT Number: NCT04524013

Swiss National Iodine Survey 2020

This study will assess iodine status in school aged children and pregnant women is Switzerland. In addition, thyroid status and omega-3 index will be assessed in pregnant women.

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Key information

Conditions

Healthy

Age range

6 year–44 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Human Nutrition Laboratory, ETH Zurich

Zurich, 8092, Switzerland

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Healthy
  • for pregnant women: confirmed pregnancy
  • living in Switzerland for min 1 year

Exclusion criteria

  • no history of major medical illness
  • no iodine containing contrast agents or medication in the past 6 months

Treatment and study plan

There is no intervention. It is an observational study.

Other

There is not intervention

Primary outcomes

  1. Urinary iodine concentration

    Time frame: Baseline

    urinary iodine concentration in spot urine samples

Secondary outcomes

  1. Urinary creatinine concentration

    Time frame: Baseline

    Urinary creatinine concentration in spot urine samples

  2. Urinary sodium concentration

    Time frame: Baseline

    Urinary sodium concentration in spot urine samples

  3. Urinary fluoride concentration

    Time frame: Baseline

    Urinary fluoride concentration in spot urine samples

  4. Thyroid stimulating hormone

    Time frame: Baseline

    TSH from dried blood spots

  5. T3

    Time frame: Baseline

    T3 from dried blood spots

  6. T4

    Time frame: Baseline

    T4 from dried blood spots

  7. Omega 3 index

    Time frame: Baseline

    Omega 3 index from dried blood spots

Other outcomes

  1. Weight

    Time frame: Baseline

  2. Height

    Time frame: Baseline

  3. Omega 3 intake

    Time frame: Baseline

    Assessment of omega 3 intake using a food frequency questionnaire

  4. Depressive symptoms

    Time frame: Baseline

    Assessment of depressive symptoms using the Edinburgh Postnatal Depression Scale (EPDS).

Sponsors and collaborators

Lead sponsor

Isabelle Herter-Aeberli

Other

Collaborators

  • Department of Epidemiology and Health Services, Unisanté, Lausanne
  • University Children's Hospital, Zurich

Registry information

Important dates

Study start
2020
Primary completion
2022
Study completion
2023
First posted
Aug 24, 2020
Registry last updated
Nov 22, 2023

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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