CRP and COVID-19: To further evaluate whether the diagnostic value of cytokines/chemokines in surviving and non-surviving COVID-19 patients is superior to that of other common inflammatory markers, and whether the combined diagnostic value is improved compared to single markers, we included neutrophil-to-lymphocyte ratio (NLR), lymphocyte-to-monocyte ratio (LMR), platelet-to-lymphocyte ratio (PLR), and inflammatory markers such as SAA and CRP in the comparative study.