Pre-existing chronic illnesses as a risk factor for the onset of respiratory failure due to COVID-19

Problem considered

Having cardiovascular, pulmonary and metabolic illnesses increases the likelihood of developing critical COVID-19. As the global population is aging, people with chronic illnesses may have high demands for health care, including critical care, in future health crises. The purpose of this research was to examine whether presence of different pre-existing chronic illnesses were associated with the onset of respiratory failure among patients who were treated and discharged from the intensive care unit.

Methods

A retrospective cohort study was conducted at the University Hospital “Dr Dragiša Mišović-Dedinje” in Belgrade (Serbia) during the January–March 2021 epidemic wave, which had the highest mortality rate in Serbia. The study included COVID-19 patients who were treated and discharged from the intensive care unit (ICU). Data on chronic illnesses and clinical parameters regarding COVID-19 were retrieved from the electronic medical records.

Results

Of 299 surviving ICU-treated patients during the study period, 47.5 % required mechanical ventilation. The adjusted logistic regression models adjusted for body mass index (BMI), platelet count, C-reactive protein, interleukin-6, lactate dehydrogenase, urea, oxygen saturation on admission and CT score showed that diabetes, neurological disorders (predominantly stroke), and recent injuries/fractures were independently associated with the onset of respiratory failure. Patients who had respiratory failure also had a higher BMI, laboratory parameters, and CT severity scores on admission.

Conclusion

People with pre-existing diabetes, neurological disorders (especially stroke), and recent injuries/fractures are at higher risk of respiratory failure in COVID-19 and should strictly adhere to COVID-19 prevention measures to minimize the risk of getting infected.