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Original ArticleOpen Access
Prevalence of Thyroid Antibodies in Thai Patients with Chronic Idiopathic Urticaria
One hundred Thai patients with chronic idiopathic urticaria (CIU) were studied to determine
the prevalence of thyroid antibodies in comparison to 100 age-and sex-matched healthy volunteers.
It
was found that 21 patients (21%) with CIU were positive for thyroid antibodies. Among normal
volunteers, only nine cases (9%) had elevated titers of thyroid antibodies. The frequency of thyroid
antibodies in the chronic urticaria group was significantly more common than the control group
(chi-square= 4.75, p=0.03). Among 21 patients with CIU who were positive for thyroid antibodies,
9 cases were negative for thyroid antibodies when repeating the tests after 3 months. Only 12
patients still had persistent elevation of antibodies after 3 months and thyroid function test was per-
formed in these 12 patients. It was found that 9 cases had autoimmune thyroiditis with euthyroidism.
One case had subclinical hyperthyroidism. One case had autoimmune hyperthyroidism. One case had
subclinical hypothyroidism.
Key word : Hives, Autoimmune Thyroiditis, Hypothyroidism, Hyperthyroidism
the prevalence of thyroid antibodies in comparison to 100 age-and sex-matched healthy volunteers.
It
was found that 21 patients (21%) with CIU were positive for thyroid antibodies. Among normal
volunteers, only nine cases (9%) had elevated titers of thyroid antibodies. The frequency of thyroid
antibodies in the chronic urticaria group was significantly more common than the control group
(chi-square= 4.75, p=0.03). Among 21 patients with CIU who were positive for thyroid antibodies,
9 cases were negative for thyroid antibodies when repeating the tests after 3 months. Only 12
patients still had persistent elevation of antibodies after 3 months and thyroid function test was per-
formed in these 12 patients. It was found that 9 cases had autoimmune thyroiditis with euthyroidism.
One case had subclinical hyperthyroidism. One case had autoimmune hyperthyroidism. One case had
subclinical hypothyroidism.
Key word : Hives, Autoimmune Thyroiditis, Hypothyroidism, Hyperthyroidism
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