Fig. 2From: Identifying critical inhalation technique errors in Dry Powder Inhaler use in patients with COPD based on the association with health status and exacerbations: findings from the multi-country cross-sectional observational PIFotal studyAssociations between individual inhalation errors and the Clinical COPD Questionnaire (CCQ) and the COPD Assessment Test (CAT). For continuous outcomes (CCQ / CAT) linear multilevel models were used, reporting the estimate of the difference (β) in the absolute score (and 95% CI) between the dichotomous predictors (patients with and without the inhalation technique error)Back to article page