Role and Experience of a Subintensive Care Unit in Caring for Patients With COVID-19 in Italy: The CO-RESP Study

Abstract

Objective: This retrospective and prospective cohort study was designed to describe the characteristics, treatments, and outcomes of patients with SARS-CoV-2 infection (COVID-19) admitted to subintensive care units (SICU) and to identify the variables associated with outcomes. SICUs have been extremely stressed during the pandemic, but most data regarding critically ill COVID-19 patients come from intensive care units (ICUs). Studies about COVID-19 patients in SICUs are lacking. Setting and participants: The study included 88 COVID-19 patients admitted to our SICU in Cuneo, Italy, between March and May 2020. Measurements: Clinical and ventilatory data were collected, and patients were divided by outcome. Multivariable logistic regression analysis examined the variables associated with negative outcomes (transfer to the ICU, palliation, or death in a SICU). Results: A total of 60 patients (68%) had a positive outcome, and 28 patients (32%) had a negative outcome;69 patients (78%) underwent continuous positive airway pressure (CPAP). Pronation (n=37 [42%]) had been more frequently adopted in patients who had a positive outcome vs a negative outcome (n=30 [50%] vs n=7 [25%];P=.048), and the median (interquartile range) Pao2 /Fio2 ratio after 6 hours of prone positioning was lower in patients who had a negative outcome vs a positive outcome (144 [140-168] vs 249 [195268], P=.006). Independent predictors of a negative outcome were diabetes (odds ratio [OR], 8.22;95% CI, 1.50-44.70;P=.015), higher D-dimer (OR, 1.28;95% CI, 1.04-1.57;P=.019), higher lactate dehydrogenase level (OR, 1.003;95% CI, 1.000-1.006;P=.039), and lower lymphocytes count (OR, 0.996;95% CI, 0.993-0.999;P=.004). Conclusion: SICUs have a fundamental role in the treatment of critically ill patients with COVID-19, who require longterm CPAP and pronation cycles. Diabetes, lymphopenia, and high D-dimer and LDH levels are associated with negative outcomes.