The study population included patients with both COPD and depression/anxiety. They were identified as follows: Patients who had at least one pharmacy claim for a maintenance medication used to treat COPD were identified. Of these, patients were considered to have comorbid depression/anxiety if they had at least one prescription claim for a medication used to treat depression/anxiety and a diagnosis code for depression/anxiety during 1 year pre-index or within 60 days after the index date.