CRP and chronic obstructive pulmonary disease: Our results showed that moderate but significan correlations (r = 0.262 to 0.409) were found between the levels of CRP and fibrinogen and concurrent CAT scores, SGRQ scores, and mMRC grades, these are reasonable as the clinical symptoms and poor health status in COPD patients are caused by a great many factors including the systemic inflammation [2,26].