Practical Geriatrics ›› 2025, Vol. 39 ›› Issue (5): 456-460.doi: 10.3969/j.issn.1003-9198.2025.05.005

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The level of vitamin D and the prevalence of autoimmune thyroiditis in rural elderly: a cross-sectional study

ZHANG Jie, WANG Qifeng, MI Weinuo, ZHANG Lina, GHEN Guofang, SUN Yu, XU Shuhang, LIU Chao   

  1. Department of Endocrinology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China (ZHANG Jie, MI Weinuo, ZHANG Lina, GHEN Guofang, XU Shuhang, LIU Chao); Key TCM Syndrome and Treatment of Yingbing (Thyroid Disease) of State Administration of Traditional Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, China (WANG Qifeng); Department of Endocrinology, the Affiliated Suqian Hospital of Xuzhou Medical University, Suqian 223800, China (SUN Yu)
  • Received:2024-09-03 Online:2025-05-20 Published:2025-05-20
  • Contact: LIU Chao, Email: liuchao@nfmcn.com

Abstract: Objective To explore the prevalence of autoimmune thyroiditis (AIT) in rural elderly and to analyze the correlation between serum vitamin D level and AIT. Methods The research subjects were derived from the study of Thyroid Diseases in Older Population: Screening, Surveillance, and Intervention (TOPS study) from May to July 2021 in iodine-adequate areas of Jiangsu Province. A total of 2460 elderly aged ≥65 years were enrolled. The general data including age, gender, height and weight were collected, and relevant laboratory indicators such as thyrotropin (TSH), thyroglobulin antibody (TgAb), thyroid peroxidase antibody (TPOAb), urinary iodine, blood glucose, blood lipids, and serum 25(OH)D were detected. The prevalence characteristics of AIT was analyzed, and a binary logistic regression model was established to analyze the correlation between serum 25(OH)D level and AIT. Results Among 2460 participants, 290 cases presented with AIT (11.79%). The prevalence rate of AIT in women was significantly higher than that in men (15.14% vs 8.55%, P<0.001). The median 25(OH)D level in the participants was 30.80 ng/mL. Women had a significantly lower median 25(OH)D level than men (25.80 ng/mL vs 36.00 ng/mL, P<0.001). Additionally, the elderly with AIT had a significantly lower median 25(OH)D level than those without AIT (28.40 ng/mL vs 31.15 ng/mL, P<0.001). In the elderly rural women, serum 25(OH)D level was an independent risk factor for AIT (OR=0.980, 95%CI: 0.961-0.998), but serum 25(OH)D level was not associated with AIT in the elderly rural men. Conclusions There is a correlation between vitamin D level and AIT in the elderly rural women.

Key words: autoimmune thyroiditis, vitamin D, female, aged

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