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Vitamin D deficiency in non-autoimmune hypothyroidism: a case-control study

Posted on 2020-07-03 - 04:34
Abstract Background Although in many studies, the relationship between autoimmune hypothyroidism (Hashimoto) and Vitamin D deficiency was shown, no research has been performed on the role of vitamin D in non-autoimmune hypothyroidism. Methods This was a case-control study in Endocrinology clinic of Jahrom (south of Iran). The patients with Hashimoto (n = 633) and non-Hashimoto hypothyroidism (n = 305), along with a control group (n = 200) were evaluated. 25(OH) D level, T3 and T4 levels were studied and Anti TPO and Anti TG tests were performed. The results of vitamin D level were analyzed and interpreted using SPSS in terms of the cause of hypothyroidism (immune and non-immune). Results The results of the study showed a significantly lower level of vitamin D in both immune and non-immune Hashimoto’s thyroiditis (HT) in comparison to healthy controls (P < 0.05). We observed a significant inverse correlation between the vitamin D and TGAb level (p = 0.001, r = − 0.261) and a direct correlation of vitamin D with TSH level (p = 0.008, r = 0.108) in Hashimoto thyroiditis patients. Conclusion Finally, the results indicated that non-autoimmune hypothyroidism, as well as HT, is associated with vitamin D deficiency. The role of vitamin D deficiency in Hashimoto thyroiditis was thought to be in the association of higher autoantibody (TGAb) level; while, there should be further studies determining vitamin D deficiency’s role in non-immune hypothyroidism.

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