• Jingwen Hu, Yunmei Liang, Guiping Wen, Dezhong Chen, Yuanjing Liu, Hongmei Zhang, and Xiaosong Qin.
• From the Department of Laboratory Medicine (Hu, Qin), Shengjing Hospital of China Medical University, and from Department of Laboratory Medicine (Hu, Qin), Liaoning Clinical Research Center for Laboratory Medicine, Shenyang; from the Department of Pediatrics (Liang), Beijing Chaoyang Hospital Affiliated Capital Medical University, Beijing; from the Department of Pediatrics (Wen, Chen, Liu, Zhang), Molidawa Daur Autonomous Banner People's Hospital, Molidawa Daur Autonomous Banner, Hulunbuir, Inner Mongolia Autonomous Region, China.
• Saudi Med J. 2023 Apr 1; 44 (4): 413420413-420.

ObjectivesTo retrospectively analyze the vitamin D (VD) status of residents in northeastern Inner Mongolia and its relationship with the average monthly sunshine hours.MethodsSerum 25-hydroxyvitamin D[s-25(OH)D] samples from 4982 outpatients (2092 males) in Moli Dawa Daur Autonomous Banner People's Hospital, Hulunbuir, China from July 2018 to January 2022 were included in this study.ResultsThe overall median s-25(OH)D was 53.3 nmol/L, VD deficiency (<30 nmol/L), deficiency (30-50 nmol/L), sufficient (>50-250 nmol/L) and excess (>250 nmol/L) were 16% (796/4982), 30% (1495/4982), 53.4% (2658/4982) and 0.7% (33/4982). There were statistically significant differences in median s-25(OH)D by month, age-groups and gender (p<0.001). Low VD status (LVDS, including VD deficiency and insufficiency) in females was 54.6% and males was 33.9%, and the LVDS composition differed significantly by age-group and month (p<0.05). The changing trend of the median s-25(OH)D level was similar to the monthly average sunshine hours, with a slight lag.ConclusionNearly half of residents live in LVDS. LVDS is affected by month, gender, and age.Copyright: © Saudi Medical Journal.

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