CT phenotypes in mild-to-moderate chronic obstructive pulmonary disease: difference before and after the age of 60 years

•The CT phenotype in different age groups of mild-to-moderate COPD is different. •It is predominantly of “airway remodeling” type when the patient is < 60 years old. •It is predominantly of the “air-trapping” type when the patient is ≥ 60 years old. •This finding provides an important observation and research direction for COPD. AIM To investigate the pulmonary phenotype of mild-to-moderate chronic obstructive pulmonary disease (COPD) using...