Distinct phenotype and risk factor analysis of persistent airflow limitation among asthmatic children: a case-control study
Abstract Background Persistent airflow limitation (PAL) in childhood asthma is associated with a poor prognosis. The aim of this study was to categorize asthmatic children with PAL into distinct phenotypes and investigate the risk factors associated with each phenotype. Methods We conducted a case-control study with a total of 119 PAL patients and 120 non-PAL […]