However, no significant statistically significant difference was found in the history of smoking, previous history of chronic obstructive pulmonary disease (COPD), bronchial asthma, or chronic bronchitis, symptoms (cough, expectoration, fever, fatigue, chest tightness, and chest pain), or indicators (hemoglobin, leukocyte, and albumin) (all p > 0.05) (Table 1). Here, ALB is linked to chronic bronchitis.