Vitamin D supplementation may reduce in-hospital and intensive care unit (ICU) mortality in patients with chronic obstructive pulmonary disease (COPD), according to a study published in . frontiers of medicine.1
The researchers explained that patients with severe COPD often require admission to the ICU due to acute exacerbations and respiratory failure. Despite recent advances, mortality rates for COPD patients admitted to the ICU remain high, they noted. Therefore, researchers emphasized the need to identify modifiable factors that influence patient outcomes in order to improve patient prognosis.
They found new evidence suggesting that vitamin D, which is well known for its role in bone health, immune function, and calcium metabolism, may play an important role in respiratory health and disease outcomes in COPD patients. He pointed out that there is. For example, past research has found that vitamin D may reduce the risk of respiratory infections and subsequent mortality by modulating immune responses, strengthening antimicrobial defenses, and modulating inflammation. Did.2 Similarly, another study described that vitamin D directly affects respiratory muscle function and lung tissue, suggesting that vitamin D may also influence disease progression and outcome in COPD patients. It means something.3
However, one study found that vitamin D deficiency is highly prevalent among COPD patients due to limited sunlight exposure, altered metabolism, and impaired synthesis. Patients with vitamin D deficiency do not receive the aforementioned benefits.Four Also, despite its potential, the researchers noted that it remains unclear how vitamin D supplementation affects mortality in COPD patients admitted to the ICU.1 For this reason, researchers conducted a study to better understand the relationship between vitamin D supplementation and mortality in COPD patients admitted to the ICU.
Vitamin D | Image credit: MP Studio – Stock.adobe.com
To do so, they used data from the Medical Information Marketplace for Intensive Care IV (MIMIC-IV). This data includes comprehensive data on 315,460 patients admitted to Beth Israel Deaconess Medical Center (BIDMC)’s ICU between 2008 and 2019. . He was diagnosed with COPD upon admission. However, the researchers excluded those under 18 years of age, those with multiple hospitalizations or ICU admissions, and those whose hospitalization or ICU stay was less than 24 hours.
The study population consisted of 3,203 patients with COPD. The researchers divided them into two groups based on their vitamin D usage. They classified 587 patients into the vitamin D group and 2616 patients into the non-vitamin D group.
Patients in the vitamin D group had significantly higher in-hospital survival (P < .001). More specifically, in the unadjusted model, in-hospital (HR, 1.9; 95% CI, 1.4-2.4; P < .001) and ICU mortality (HR, 1.9; 95% CI, 1.3-2.6; P = .001) rate was significantly higher in the group not receiving vitamin D. After adjusting for confounding variables, the group not taking vitamin D remained at increased in-hospital risk (HR, 1.7; 95% CI, 1.3-2.3; 95% CI, 1.3-2.3; P < .001) and ICU mortality (HR, 1.8; 95% CI, 1.6-2.6; P = .003) when compared to the vitamin D group.
Additionally, the researchers conducted subgroup analyzes of in-hospital and ICU mortality based on clinically meaningful scores and several comorbidities. In particular, a significant interaction between gender and in-hospital mortality was observed, as female patients with COPD who received vitamin D supplementation showed a reduced risk of in-hospital mortality.
The researchers acknowledged several study limitations, one of which was that it was a retrospective cohort study, so they were unable to capture vitamin D levels during treatment or trends after treatment. Also, this study only focused on whether COPD patients were supplemented with vitamin D, not the specific dosage. The researchers suggested areas for further research based on their findings and limitations.
“As vitamin D is an inexpensive and safe drug, further clinical trials need to be conducted to provide more solid evidence on whether vitamin D improves the prognosis of COPD patients admitted to the ICU.” the authors concluded.
References
1. He Q, Hu S, Xie J, Ge Y, Li C. Vitamin D supplementation may be beneficial in improving the prognosis of chronic obstructive pulmonary disease patients in intensive care units: a retrospective study. Front Med (Lausanne). 2024;11:1334524. doi:10.3389/fmed.2024.1334524
2. Huang W, Xie R, Hong Y, Chen Q. Association between comorbid chronic obstructive pulmonary disease and prognosis in patients admitted to intensive care units for reasons other than COPD: a retrospective cohort study. Int J Chron Obstruct Palmon Dis. (2020) 15:279–87. doi:10.2147/COPD.S244020
3. Gawron G, Trzaska-Sobczak M, Sozańska E, Śnieżek P, Barczyk A. Vitamin D status in severe COPD patients with chronic respiratory failure. Adv Respir Med. (2018)86:78–85. doi:10.5603/ARM.2018.0010
4. Afzal M, Kazmi I, Al-Abbasi FA, Al-Shehri S, Ghoneyim MM, Imam SS, et al. Current overview of the therapeutic potential of vitamin D in inflammatory lung diseases. biomedical science.(2021)9:21843. doi:10.3390/Biomedicine9121843
