Background Tocilizumab, an interleukin-6 receptor blocker, has been used in the inflammatory phase of COVID-19, but its impact independent of corticosteroids remains unclear in patients with severe disease. Methods In this retrospective analysis of patients with COVID-19 admitted between March 2 and April 14, 2020 to a large academic medical center in New York City, we describe outcomes associated with tocilizumab 400 mg (without methylprednisolone) compared to a propensity-matched control. The primary endpoints were change in a 7-point ordinal scale of oxygenation and ventilator free survival, both at days 14 and 28. Secondary endpoints include incidence of bacterial superinfections and gastrointestinal perforation. Primary outcomes were evaluated using t-test. Results We identified 33 patients who received tocilizumab and matched 74 controls based on demographics and health measures upon admission. After adjusting for illness severity and baseline ordinal scale, we failed to find evidence of an improvement in hypoxemia based on an ordinal scale at hospital day 14 in the tocilizumab group (OR 2.2; 95% CI, 0.7–6.5; p = 0.157) or day 28 (OR 1.1; 95% CI, 0.4–3.6; p = 0.82). There also was no evidence of an improvement in ventilator-free survival at day 14 (OR 0.8; 95% CI, 0.18–3.5; p = 0.75) or day 28 (OR 1.1; 95% CI, 0.1–1.8; p = 0.23). There was no increase in secondary bacterial infection rates in the tocilizumab group compared to controls (OR 0.37; 95% CI, 0.09–1.53; p = 0.168). Conclusions There was no evidence to support an improvement in hypoxemia or ventilator-free survival with use of tocilizumab 400 mg in the absence of corticosteroids. No increase in secondary bacterial infections was observed in the group receiving tocilizumab.
【초록키워드】 Corticosteroid, COVID-19, Methylprednisolone, Corticosteroids, Tocilizumab, hospital, interleukin-6, outcome, bacterial superinfection, New York City, Health, Hypoxemia, Patient, inflammatory phase, Control, Retrospective analysis, Bacterial infection, Secondary bacterial infections, incidence, Bacterial infections, Admission, interleukin-6 receptor, Ordinal Scale, Evidence, primary endpoint, severe disease, Oxygenation, Illness severity, demographics, evidence of, independent of, no evidence of, receptor blocker, Support, Endpoint, ventilator, 95% CI, primary endpoints, Secondary endpoints, 7-point ordinal scale, bacterial superinfections, gastrointestinal perforation, large academic medical center, no increase, Primary outcomes, t-test, ventilator free survival, ventilator-free survival, measure, secondary bacterial infection, secondary, independent, Result, include, evaluated, receiving, absence, increase in, baseline, patients with COVID-19, 【제목키워드】 Retrospective study, COVID-19 outbreak,