Balkan Medical Journal (Nov 2023)

The Impact of CoronaVac Vaccination on 28-day Mortality Rate of Critically Ill Patients with COVID-19 in Türkiye

  • Fethi Gül,
  • Umut Sabri Kasapoğlu,
  • Mehmet Süleyman Sabaz,
  • Pınar Ay,
  • Burçin Doruk Oktay,
  • Gülbahar Çalışkan,
  • Nalan Demir,
  • İsmet Sayan,
  • Feyyaz Kabadayı,
  • Gülsüm Altuntaş,
  • Ayça Gümüş,
  • Hülya Kırca,
  • Deniz Şanlı,
  • Fatma Acil,
  • Andaç Dedeoğlu,
  • Sedef Gülçin Ural,
  • İrem Akın Şen,
  • Eda Macit Aydın,
  • Hakan Dayanır,
  • Birgül Yelken,
  • İlkay Ceylan,
  • Osman Özcan Aydın,
  • Güneş Eskidemir,
  • Ahmet Aytekin,
  • Melike Cengiz,
  • Ülkü Arslan,
  • Devrim Akdağ,
  • Gülçin Hilal Alay,
  • Esra Tekin,
  • Volkan Yarar,
  • Kemal Tolga Saracoğlu,
  • Funda Gök,
  • Volkan Alparslan,
  • Verda Tuna,
  • Murside Yıldız,
  • Nimet Şenoğlu,
  • Cenk Kıraklı,
  • Süleyman Yıldırım,
  • Kübra Saçar Kübüç,
  • Ayşen Erer,
  • Hamza Gültekin,
  • Kezban Özmen Süner,
  • Özge Kuzgun,
  • Çağatay Erman Öztürk,
  • Aydın Karahan,
  • Okan Deveci,
  • Mustafa Ay,
  • Dilara Tüfek Öztan,
  • Seda Banu Akıncı,
  • Melahat Yalçın Solak,
  • Süha Bozbay,
  • Serhat Özçiftçi,
  • Kamil Gönderen,
  • Ahmet Oğuzhan Küçük,
  • Berna Uyan,
  • Gülseren Elay,
  • Nazlıhan Boyacı,
  • Mustafa Timurkaan,
  • Ebru Karakoç,
  • Lerzan Doğan,
  • Erdem Yalçınkaya,
  • Leyla Kazancıoğlu,
  • Gül Erdal Dönmez,
  • Barış Yılmaz,
  • Dursun Fırat Ergül,
  • Maruf Boran,
  • Hüseyin Özkarakaş,
  • Buğra Karakaş,
  • Perihan Ergin Özcan,
  • İlkay Anaklı,
  • Mustafa Kemal Bayar,
  • Didem Yüksel,
  • Şükriye Akdağ,
  • Özcan Pişkin,
  • Sibel Temur,
  • Selin Eyüpoğlu,
  • Elvan Tekir Yılmaz,
  • Gizem Zaim Avcı,
  • Raziye Turan,
  • Fatma Alkan Bayburt,
  • Helin Şahintürk,
  • Bülent Güçyetmez,
  • Mustafa Muhlis Alparslan,
  • Metin Yarıcı,
  • Fatma Yıldırım,
  • Abdulkadir Yektaş,
  • Güçlü Yaman,
  • Oktay Demirkıran,
  • İsmail Cinel

DOI
https://doi.org/10.4274/balkanmedj.galenos.2023.2023-6-90
Journal volume & issue
Vol. 40, no. 6
pp. 435 – 444

Abstract

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Background:Vaccines against coronavirus disease-19 (COVID-19) have been effective in preventing symptomatic diseases, hospitalizations, and intensive care unit (ICU) admissions. However, data regarding the effectiveness of COVID-19 vaccines in reducing mortality among critically ill patients with COVID-19 remains unclear.Aims:To determine the vaccination status and investigate the impact of the COVID-19 vaccine on the 28-day mortality in critically ill patients with COVID-19.Study Design:Multicenter prospective observational clinical study.Methods:This study was conducted in 60 hospitals with ICUs managing critically ill patients with COVID-19. Patients aged ≥ 18 years with confirmed COVID-19 who were admitted to the ICU were included. The present study had two phases. The first phase was designed as a one-day point prevalence study, and demographic and clinical findings were evaluated. In the second phase, the 28-day mortality was evaluated.Results:As of August 11, 2021, 921 patients were enrolled in the study. The mean age of the patients was 65.42 ± 16.74 years, and 48.6% (n = 448) were female. Among the critically ill patients with COVID-19, 52.6% (n = 484) were unvaccinated, 7.7% (n = 71) were incompletely vaccinated, and 39.8% (n = 366) were fully vaccinated. A subgroup analysis of 817 patients who were unvaccinated (n = 484) or who had received two doses of the CoronaVac vaccine (n = 333) was performed. The 28-day mortality rate was 56.8% (n = 275) and 57.4% (n = 191) in the unvaccinated and two-dose CoronaVac groups, respectively. The 28-day mortality was associated with age, hypertension, the number of comorbidities, type of respiratory support, and APACHE II and sequential organ failure assessment scores (p < 0.05). The odds ratio for the 28-day mortality among those who had received two doses of CoronaVac was 0.591 (95% confidence interval: 0.413-0.848) (p = 0.004).Conclusion:Vaccination with at least two doses of CoronaVac within six months significantly decreased mortality in vaccinated patients than in unvaccinated patients.