Maoliang Tian,1,* Wenqiang Li,1,* Xiaoyu He,2 Qian He,3 Qian Huang,4 Zhiping Deng1 

1Zigong First People’s Hospital, Zigong City, Sichuan Province, 643000, People’s Republic of China; 2North Sichuan Medical College, Nanchong, Sichuan Province, 637000, People’s Republic of China; 3West China Second Hospital of Sichuan University, Chengdu, Sichuan Province, 610044, People’s Republic of China; 4Dazhou Dachuan District People’s Hospital (Dazhou Third People’s Hospital), Dazhou, Sichuan Province, 635000, People’s Republic of China

*These authors contributed equally to this work

Correspondence: Qian Huang, Dazhou Dachuan District People’s Hospital (Dazhou Third People’s Hospital), Dazhou, Sichuan Province, 635000, People’s Republic of China, Email hq15196767955@163.com Zhiping Deng, Zigong First People’s Hospital, Zigong City, Sichuan Province, 643000, People’s Republic of China, Email dengzp1016@163.com

Background: In human health, vitamins play a vital role in various metabolic and regulatory processes and in the proper functioning of cells. Currently, the effect of Vitamin E (VE) intake on multiple causes of death in Chronic obstructive pulmonary disease (COPD) patients is unclear. Therefore, this paper aims to investigate the relationship between VE and multiple causes of death in COPD patients, to guide the rationalization of dietary structure and reduce the risk of COPD death.
Methods: This study screened patients with COPD aged ≥ 40 years from the National Health and Nutrition Examination Survey (NHANES) database 2008– 2018. Weighted COX regression was used to analyze the association between VE intake and multiple causes of death in COPD. The restricted cubic spline(RCS) is drawn to show their relationship. Finally, we conducted a subgroup analysis for further verification.
Results: A total of 1261 participants were included in this study. After adjustment for multiple covariates, VE intake was associated with all-cause death in COPD patients, and chronic lower respiratory disease (CLRD) deaths were linearly associated with cardiovascular disease (CVD) deaths there was no such correlation. Subgroup analyses showed no interaction between subgroups, further validating the robustness of the relationship.
Conclusion: In COPD patients, VE intake was negatively associated with all-cause mortality and CLRD death. Higher VE intake reduces the risk of all-cause mortality and CLRD death in COPD patients.

Keywords: vitamin E, COPD, CVD, CLRD, COX regression analyses