CRP and Pleural effusion: Based on the criteria of fever lasting over 10.5 days, presence of pleural effusion, WBC >10.13×109 cells/L, Neu# >6.43×109 cells/L, CRP >29.45 mg/L, LDH >370.50 U/L, NLR >3.47, and SUA <170.5 μmol/mL, they constructed a prediction model for RMPP.