Abstract
BackgroundSystemic baricitinib and corticosteroids play important roles in treating severely and critically ill patients with coronavirus disease 2019 (COVID-19). However, the efficacy of the combination of baricitinib and corticosteroids compared to that of corticosteroid monotherapy in severely and critically ill hospitalized patients with COVID-19 remains unclear. MethodsWe analyzed severely and critically ill hospitalized patients with COVID-19 aged >18 years between January 1, 2020 and May 31, 2023, using a Japanese multicenter inpatient database. We performed propensity score matching to analyze the effect of the combination of baricitinib and corticosteroids within 2 days of hospital admission (combination group) on the 28-day and in-hospital mortality rates compared with those of corticosteroid monotherapy within 2 days of hospital admission (control group). Sensitivity analysis was performed using inverse probability weighting analysis and the generalized estimating equation method. ResultsThe eligible patients (n=7,433) were divided into a combination (n = 679) and a control group (n = 6,754). One-to-four propensity score matching analyses included 566 combination and 2,264 control group patients. There was no significant difference in 28-day (8.5% vs. 8.8%; risk difference, -0.3% [95% confidence interval, −2.9 to 2.3]) or in-hospital (11% vs. 10%; risk difference, 1.0 [−1.9 to 3.9]) mortality rates between 2 groups. The sensitivity analysis showed similar outcomes. ConclusionThis observational study, using a Japanese multicenter inpatient database, found that the combination of baricitinib and corticosteroid therapy did not improve the 28-day or in-hospital mortality rates in severely and critically ill patients with COVID-19 compared to corticosteroid monotherapy.
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