Vitamin D Insufficiency and Thyroid Capacity in Postmenopausal Women

About half of the world's population suffer from Vitamin D inadequacy. Although there are reports of Vitamin D insufficiency in immune-mediated hypothyroidism, an association between Vit. D and thyroid stimulating hormone (TSH) levels has yet to be revealed. This prospective study was conducted at Al-Karama Teaching Hospital in Baghdad from January to December 2016 on (150) postmenopausal women whose average age was (62.2�5.3) years, and their records during routine maintenance vis-its were reviewed. All patients were examined for the symptoms related to thyroid function and osteoporosis. Participants were divided into three subgroups according to their TSH levels (below 4.0 mIU/L). Patient characteristics and Vit. D levels were compared between these subgroups. Multivariate linear regression model was constructed using serum Vit. D and serum TSH as the dependent variables to identify factors independently associated with these laboratory values. Vitamin D was insufficient (10-30 ng/mL) in 20 (17.2%) and deficient (