RESUMEN

ObjectiveApproximately 5% of patients with coronavirus disease 2019 (COVID-19) develop a life-threatening pneumonia that often occurs in the setting of increased inflammation or "cytokine storm". Anti-cytokine treatments are being evaluated but optimal patient selection remains unclear, and the aim of our study is to address this point. MethodsBetween February 29 to April 6, 2020, 111 consecutive hospitalized patients with COVID-19 pneumonia were evaluated in a single centre retrospective study. Patients were divided in two groups: 42 severe cases (TOCI) with adverse prognostic features including raised CRP and IL-6 levels, who underwent anti-cytokine treatments, mostly tocilizumab, and 69 standard of care patients (SOC). ResultsIn the TOCI group, all received anti-viral therapy and 40% also received glucocorticoids. In TOCI, 62% of cases were ventilated and there were 3 deaths (17.8{+/-}10.6 days, mean follow up) with 7/26 cases remaining on ventilators, without improvement, and 17/26 developed bacterial superinfection. One fatality occurred in the 15 TOCI cases treated on noninvasive ventilation and 1 serious bacterial superinfection. Of the 69 cases in SOC, there was no fatalities and no bacterial complications. The TOCI group had higher baseline CRP and IL-6 elevations (p<0.0001 for both) and higher neutrophils and lower lymphocyte levels (p= 0.04 and p=0.001, respectively) with the TOCI ventilated patients having higher markers than non-ventilated TOCI patients. ConclusionHigher inflammatory markers, more infections and worse outcomes characterized ventilated TOCI cases compared to ward based TOCI. Despite the confounding factors, this suggests that therapy time in anti-cytokine randomized trials will be key. FundingThis research received no external funding. Conflicts of Interest"The authors declare no conflict of interest." HighlightsO_LIThere is an urgent need for markers of prognosis in COVID-19. C_LIO_LIHigher inflammatory markers best select tocilizumab treatment. C_LIO_LIThe ward based tocilizumab group showed better responses and less infections than ICU tocilizumab group. C_LIO_LIThe former group may be the best for evaluating the impact of anti-cytokine therapy in COVID-19. C_LIO_LIThe known poor risk factors for COVID-19 infection were present in the TOCI treated rather than in the good prognosis standard of care group. C_LI