The analysis showed an association between pneumonia and heart failure on NYHA III and IV scale (OR = 4.56, p < 0.001), COPD (OR = 2.66, p < 0.001), extracardiac arteriopathy (OR = 3.06, p < 0.001), NIHHS scale at discharge (OR = 1.15, p < 0.001), and CRP/HGB ratio (OR = 1.17, p < 0.001). Here, CRP is linked to pneumonia.