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Follow up of patients with postpartum thyroiditis: a population-based study
Farzaneh Sarvghadi1, Mehdi Hedayati, Yadollah Mehrabi
1Endocrine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, I.R. Iran.
Endocrine
|October 19, 2005
Summary
Postpartum thyroiditis (PPT) can lead to permanent hypothyroidism in 22% of cases. High anti-thyroperoxidase (anti-TPO ab) antibody and TSH levels during the postpartum period predict this long-term thyroid condition.
Area of Science:
- Endocrinology
- Thyroidology
- Reproductive Medicine
Background:
- Postpartum thyroiditis (PPT) is a common thyroid disorder affecting women after childbirth.
- The long-term sequelae of PPT, particularly permanent hypothyroidism, require further investigation.
Purpose of the Study:
- To determine the prevalence of permanent hypothyroidism 3-5 years after PPT.
- To identify prognostic factors for the development of permanent hypothyroidism following PPT.
Main Methods:
- A longitudinal survey involving 120 women with a history of PPT and 920 healthy controls.
- Assessment included demographic data, clinical examination, and measurement of thyroid hormones (T3, T4, RT3U, TSH) and antibodies (anti-thyroperoxidase [anti-TPO ab], anti-thyroglobulin [anti-Tg ab]).
Main Results:
- Permanent hypothyroidism was diagnosed in 22% of women with PPT compared to 4% in the control group (p<0.01).
- Women who developed permanent hypothyroidism (PPT-Hypo) exhibited significantly higher titers of anti-TPO ab and peak TSH levels during the PPT phase than those who remained euthyroid (PPT-Eu).
Conclusions:
- This study reveals a high prevalence of permanent hypothyroidism following PPT in Tehran.
- Elevated anti-TPO ab titers and TSH levels in the postpartum period are significant predictors of permanent hypothyroidism after PPT.