Vitamin D Deficiency is Associated with Decreased Lung Function in Chinese Adults with Asthma
Overview
Authors
Affiliations
Background: Vitamin D deficiency has been associated with markers for allergy and asthma severity in children with asthma. However, its association with Chinese adult asthmatics has not been studied.
Objective: To examine whether vitamin D status is associated with lung function and total serum IgE in Chinese adults with newly diagnosed asthma.
Methods: We conducted a cross-sectional study including 435 Chinese patients aged >18 years with newly diagnosed asthma. Vitamin D status was assessed by measuring serum 25 hydroxyvitamin D (25OHD) concentrations. The primary outcomes included airflow limitation, as measured by the forced expiratory volume in 1 s (FEV(1)), FEV(1) % predicted, and FEV(1)/forced vital capacity (FVC), and serum total IgE concentration.
Results: Vitamin D deficiency was prevalent in Chinese adults with asthma, with 88.9% of the subjects having 25OHD <50 nmol/l. Serum 25OHD concentration was positively correlated with FEV(1) % predicted (p = 0.02, r = 0.12). After adjusting for age, sex, body mass index, smoking, month of blood collection, and symptom duration, we found significant positive associations between 25OHD concentrations and FEV(1) (in liters), FEV(1) % predicted, and FEV(1)/FVC (p for trend < 0.05 for all). The adjusted odds ratios for the highest versus the lowest 25OHD quartile were 0.50 (0.26-0.96) for FEV(1) <75% predicted and 0.44 (0.20-0.95) for FEV(1)/FVC% <0.75. There was no significant association between 25OHD concentrations and total IgE.
Conclusions: Vitamin D deficiency was highly prevalent in Chinese asthma patients, and vitamin D status was associated with lung function.
Li T, Wang Q, Li Y, Zhang W, Chen M, Deng B Nutr J. 2025; 24(1):26.
PMID: 39955522 PMC: 11829343. DOI: 10.1186/s12937-024-01065-6.
El Abd A, Dasari H, Dodin P, Trottier H, Ducharme F Respir Res. 2024; 25(1):344.
PMID: 39322954 PMC: 11423515. DOI: 10.1186/s12931-024-02967-z.
Abi-Ayad M, Nedjar I, Chabni N Lung India. 2023; 40(5):449-456.
PMID: 37787360 PMC: 10553772. DOI: 10.4103/lungindia.lungindia_213_23.
The Role of Vitamins in the Pathogenesis of Asthma.
Zajac D, Wojciechowski P Int J Mol Sci. 2023; 24(10).
PMID: 37239921 PMC: 10218465. DOI: 10.3390/ijms24108574.
Alkhatatbeh M, Almomani H, Abdul-Razzak K, Samrah S NPJ Prim Care Respir Med. 2021; 31(1):27.
PMID: 33990605 PMC: 8121852. DOI: 10.1038/s41533-021-00239-7.