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?:abstract
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OBJECTIVE: To illustrate the effect of corticosteroids and heparin, respectively, on Coronavirus Disease 2019 (COVID-19) patients\' CD8+ T cells and D-Dimer METHODS: In this retrospective cohort study involving 866 participants diagnosed with COVID-19, patients were grouped by severity Generalized additive models were established to explore the time-course association of representative parameters of coagulation, inflammation and immunity Segmented regression was performed to examine the influence of corticosteroids and heparin upon CD8+ T cell and D-Dimer, respectively RESULTS: There were 541 moderate, 169 severe and 156 critically ill patients involved in the study Synchronous changes of levels of NLR, D-Dimer and CD8+ T cell in critically ill patients were observed Administration of methylprednisolone before 14 DFS compared with those after 14 DFS (β = 0 154%, 95% CI=(0, 0 302), p = 0 048) or a dose lower than 40 mg per day compared with those equals to 40 mg per day (β = 0 163%, 95% CI=(0 027, 0 295), p = 0 020) significantly increased the rising rate of CD8+ T cell in 14 to 56 DFS CONCLUSION: The parameters of coagulation, inflammation and immunity were longitudinally correlated, and an early low-dose corticosteroid treatment accelerated the regaining of CD8+ T cell to help battle against SARS-Cov-2 in critical cases of COVID-19
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