Establishment of Diagnosis and Classification System for Lung Interstitial and Airway Diseases (LIAD)

This study focuses on both hospitalized and outpatient populations. Through a multicenter, retrospective study, it aims to comprehensively characterize:The comorbidity of interstitial lung diseases (ILD) and airway diseases;The comorbidity of ILD with other intrapulmonary diseases;The comorbidity of airway diseases with other intrapulmonary diseases;The comorbidity of ILD and airway diseases with extrapulmonary diseases.Based on these findings, the study seeks to propose classification and diagnostic criteria for ILD and airway disease comorbidities.Additionally, a multicenter, prospective, disease-specific cohort study will be conducted to observe the prognosis of patients with ILD and/or airway diseases, identify prognostic factors, and grade the severity of comorbid conditions based on these factors.Finally, the study will analyze the current state of interventions and the medical costs associated with ILD and airway disease comorbidities through a cost-effectiveness analysis, aiming to propose new strategies for integrated disease management.