Multidimensional assessments that included demographic characteristics, COPD duration, comorbidities, medication use, other treatment conditions, expenses, etc. were performed in all included patients. COPD control was assessed using the COPD Assessment Test (CAT). The latest PFT results, including FVC%pred, FEV1%pred and FEV1/FVC, were also recorded.
The occupational information, diagnosis and treatment preferences of all included doctors were recorded.
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