However, no correlation was found between the extent of bronchiectasis with age (r = −0.088, P = 0.416), smoking index (r = −0.049, P = 0.652), BMI (r = −0.055, P = 0.612), the time course of chronic cough/expectoration (r = –0.063, P = 0.559), the time course of dyspnea (r = 0.197, P = 0.067), mMRC score (r = 0.127, P = 0.24), frequency of AE (r = 0.168, P = 0.121), FEV1/FVC (r = 0.035, P = 0.745), FEV1%predicted (r = −0.016, P = 0.88), CRP (r = 0.165, P = 0.127), fibrinogen (r = 0.168, P = 0.121), and severity of emphysema (Goddard score) (r = 0.035, P = 0.745). Here, CRP is linked to pulmonary emphysema.