Use of thyroid hormones in hypothyroid and euthyroid patients: a THESIS* questionnaire survey of Polish physicians. *THESIS: Treatment of hypothyroidism in Europe by specialists: an international survey.

Apart from clinical practice recommendations, other factors influence the thyroid hormone therapy patterns. Moreover, certain areas of clinical practice were identified (the use of thyroid hormones in euthyroid subjects and the use of dietary supplements), which are not in accordance with the current evidence.