Abstract
Bronchiectasis is a chronic airway disease with abnormal and persistent bronchial dilatation caused by a variety of reasons. In recent years, numerous reports have shown that bronchiectasis is heterogeneous, the clinical characteristics of patients with different phenotypes are different, and the efficacy of a treatment regimen may vary greatly in patients with different bronchiectasis phenotypes. This paper summarizes the current clinical phenotypic classification of bronchiectasis from the perspective of etiology, microbiology, and the frequency of acute exacerbation, and cluster analysis was used to determine new clinical phenotypes and their statistical and clinical significance. Different tools for assessing disease severity yield different outcomes. This article summarizes the research progress in the above areas, hoping to provide a more comprehensive understanding of the disease.