This real-world study is a multi-centre, single-cohort, ambi-directional observational cohort study with both retrospective and prospective data collection, with the primary objective to assess the 12-week effectiveness of BDP/FF/GB for COPD subjects in China. The index date is the initiation date of BDP/FF/GB, and subjects may have initiated treatment with BDP/FF/GB up to 12 weeks before enrolment. Baseline period is the 12 weeks prior to index date. The end of study (EOS) for each subject will be the earliest of the following: approximately 12 weeks after BDP/FF/GB initiation (the Week 12 Visit), BDP/FF/GB discontinuation plus 2 weeks, or at early withdrawal (such as consent withdrawal, death, or lost to follow-up).
