COVID-19 in sub-intensive care unit: An italian single-center experience along the three epidemic waves

The goal was to characterize COVID-19 patients who needed treatment in Sub-Intensive Care Units (SICUs) for hypoxemic respiratory failure, describe their six-month mortality, and identify clinical and laboratory characteristics that were associated with death. Data from 216 consecutive patients admitted to the COVIDSICU of Turin’s San Giovanni Bosco Hospital were analyzed retrospectively. A total of 216 patients (24.5% of whom were female) were enrolled. The average age was 63±11.9 years. In the three waves, the six-month mortality rate was 32.8%, 35.1%, and 26.6%, respectively (p=0.52). The mortality rate was significantly higher in intubated patients compared to those not requiring intubation (60.8% versus 29.9%, p<0.01). On admission, deceased patients were older (69±7.7 versus 60.2±12.6 y.o., p<0.01), with a higher prevalence of dyslipidemia, coronary artery disease, chronic heart failure, and higher serum creatinine. However, only age was predictive of death at multivariate analysis (OR 5.29, p<0.01), with 63 years old as the best cut-point. At six months, mortality in COVID patients managed in a SICU is around 30%. Age is a significant negative prognostic factor, with 63 years of age being the best predicting cut-off.