A Retrospective Study of Serum 25 Hydroxyvitamin D Levels in Adults in the Baoding Area Regarding Gender, Age, and Seasonal Influences

Abstract

Objective: To analyse the overall nutritional status of 25 hydroxyvitamins in the population of the Baoding area, and to explore the factors influencing it. Methods: 2,022 patients who attended the Affiliated Hospital of Hebei University from July 2022 to July 2023 were selected as study subjects. Serum 25(OH)D levels were measured, and the differences in the distribution of serum 25(OH)D levels among different genders, ages, and seasons in Baoding were analyzed. Results: The mean serum 25(OH)D level of adults in the Baoding area was 16.19 ± 6.63 ng/ml, with a deficiency rate of 78.4% (1585/2022) and an insufficiency rate of 18.0% (364/2022). The serum 25(OH)D deficiency rate in adult males was 67.7% (113/167), and the difference was not statistically significant (P > 0.05) when comparing the deficiency rates of all age groups. The serum 25(OH)D deficiency rate in adult females was 79.4% (1472/1855), and the difference was statistically significant when comparing the deficiency rates in all age groups (P < 0.05). The adults in summer had the highest 25(OH)D levels, with a sufficiency rate of 1.8% (36/2022), and the difference was statistically significant when comparing the 25(OH)D levels of adults in different seasons (P < 0.01). Conclusion: The rate of vitamin D deficiency and insufficiency in the population of the Baoding area is high, so it is necessary to strengthen the publicity and education for the residents of the Baoding area, to improve the residents’ knowledge of vitamin D, and to take effective measures to improve the vitamin D level of the residents, and special attention should be paid to vitamin D supplementation of the adult females between the ages of 18–44 years old.