Effectiveness of chronic obstructive pulmonary disease (COPD) treatment with a combination of tiotropium / olodaterol in Polish standard clinical practice as measured by the improvement of the Clinical COPD Questionnaire score: an observational study.

Health‑related quality of life in patients with chronic obstructive pulmonary disease (COPD) can be measured by the Clinical COPD Questionnaire (CCQ). In this study, the CCQ was used to assess the therapeutic success of a fixed‑dose tiotropium / olodaterol combination treatment in Polish COPD patients. We aimed to evaluate the changes in the CCQ score in Polish patients with COPD after 6 weeks of treatment with tiotropium / olodaterol and to assess the predictors of response to this treatment. Data of the Polish subgroup of the NIS‑CCQ observational study (NCT03663569) were extracted. COPD patients who had received a new tiotropium / olodaterol prescription were included. The primary end point was therapeutic success predefined as a 0.4‑point reduction in the CCQ score after 6 weeks of tiotropium / olodaterol treatment. Post‑hoc logistic regression analysis was performed to identify the predictors of response to the treatment. After 6 weeks of treatment, 72.4% of patients achieved therapeutic success. The therapy was successful in 83.4% of treatment‑naïve patients, as compared with 62.6% and 73.3% of those previously treated with long‑acting muscarinic antagonists or long‑acting β2 agonists in monotherapy and in combination with inhaled corticosteroids, respectively. Therapeutic success was achieved by at least 50% of patients regardless of the COPD severity and exacerbation history but it was more frequent in patients with more severe disease. The airflow limitation severity grades 2 to 4, modified Medical Research Council Dyspnea Scale classes 2 to 4, exacerbations within the last year before the study, and treatment‑naïve status predicted a better response to tiotropium / olodaterol. Tiotropium / olodaterol treatment improved clinical control in Polish COPD patients. Therapeutic success was the most pronounced in individuals with more severe COPD and in the treatment‑naïve group but occurred also in those with moderate disease and in previously treated participants.