Fig 1.
Selection of subjects for the analysis of COPD prevalence among surgical candidates.
BD: bronchodilator, FEV1/FVC: forced expiratory volume in 1 s/forced vital capacity, COPD: chronic obstructive pulmonary disease.
Table 1.
Baseline characteristics.
Table 2.
Medical histories reported in the self-administered questionnaire.
Table 3.
Distribution of airflow limitation, level of symptoms, and exacerbation of COPD among COPD patients.
Table 4.
Distribution of patients* into GOLD categories according to symptom assessment (mMRC versus CAT scores).