| Objective To evaluate vitamin D status and study its relationship with seasons by measuring the levels of 25-hydroxyvitamin D [25(OH)D] in patients admitted to Jiangsu Province Hospital of TCM in 2017. Methods We recruited 3326 cases of outpatients and inpatients who had 25(OH)D measured from January 01, 2017 to December 31, 2017 in Jiangsu Provincial Hospital of TCM, mainly residents of Nanjing City, including department of endocrinology, department of reproductive medicine and physical examination center, excluding related influencing factors, comparisons were made on the differences in 25(OH)D levels and vitamin D nutritional status between different seasons and sexes. Results The average level of 25(OH)D in the 3326 patients in Jiangsu Province Hospital of TCM was 18.38 ng/ml, the vitamin D deficiency rate was 63.3%, the insufficiency rate was 29.0%, and the normal rate was 7.7%. Vitamin D levels in the Spring and Summer group were higher than those in the Autumn and Winter group (P?0.05). Vitamin D levels in women were significantly lower than those in men (P?0.05). Conclusion Residents in Nanjing have different degrees of vitamin D deficiency, and lower levels of 25(OH)D in autumn and winter. It is also associated with gender. Vitamin D is an indispensable vitamin in the human body and plays an important role in the skeletal system. It is necessary to increase the public’s awareness of the rational use of vitamin D supplementation and provide timely calcium supplements to high-risk groups. Regular testing of 25(OH)D as a routine laboratory test to assess vitamin D levels in the body is a way to provide scientific theoretical basis for the correct application of vitamin D in clinical practice. |