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OpenTrials
Completed

NCT Number: NCT06726967

Vitamin D, Hashimato's Thyroiditis and Thyroid Functions

The goal of this retrospective observational study is to determine whether vitamin D levels differ in patients with Hashimoto's thyroiditis (HT) compared to those without Hashimoto's thyroiditis. The main research questions are:

Are vitamin D levels lower in HT patients compared to non-HT patients? Do vitamin D levels vary between HT and non-HT patients based on thyroid function status?

The study was conducted by retrospectively reviewing the medical records of patients who visited the hospital outpatient clinic.

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Key information

Conditions

Vitamin D Thyroid Autoimmune Disease

Age range

18 year–90 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Ankara Bilkent City Hospital

Ankara, Çankaya, 06800, Turkey (Türkiye)

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

Patients with the following biochemical parameters:

  • Vitamin D (25(OH)D) levels
  • Thyroid-stimulating hormone (TSH) levels
  • Free triiodothyronine (fT3) levels
  • Free thyroxine (fT4) levels
  • Anti-thyroid peroxidase (anti-TPO) levels
  • Anti-thyroglobulin (anti-Tg) levels

Exclusion criteria

-

Treatment and study plan

vitamin D 25(OH)D

Diagnostic Test

Thyroid functions (thyroid-stimulating hormone (TSH), serbest triiodothyronine (fT3), serbest thyroxine (fT4)); Thyroid antibodies (Anti-thyroid peroxidase (anti-TPO), anti-thyroglobulin (anti-TG))

Other names: Thyroid functions, Thyroid antibodies

Primary outcomes

  1. Vitamin D 25 OH D

    Time frame: Baseline

    nmol/L

  2. thyroid-stimulating hormone (TSH)

    Time frame: Baseline

    uIU/mL

  3. free thyroxine (fT4)

    Time frame: Baseline

    ng/dL

  4. Anti-thyroid peroxidase (anti-TPO)

    Time frame: Baseline

    IU/mL

  5. anti-thyroglobulin (anti-TG)

    Time frame: Baseline

    IU/mL

Secondary outcomes

  1. free triiodothyronine (fT3)

    Time frame: Baseline

    pg/ml

Sponsors and collaborators

Lead sponsor

Ankara Yildirim Beyazıt University

Other

Collaborators

  • Ankara City Hospital Bilkent

Registry information

Official study title

The Relationship Between Vitamin D Levels, Thyroid Functions, and Thyroid Autoimmunity

Important dates

Study start
2019
Primary completion
2024
Study completion
2024
First posted
Dec 10, 2024
Registry last updated
Dec 10, 2024

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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