As shown in Table 6 (model 1, 2 and 3), treatment
control (β = .19) and emotional response (β = −.33 - –.40) were associated with the CRQ-SAS’s emotional domain. Treatment control, emotional response and dyspnoea explained 35% of the variation in the CRQ-SAS’s emotional domain. These results indicate that COPD patients with better treatment control and a weaker emotional response to their disease have better HRQoL as measured by the CRQ-SAS’s emotional domain (the mean of the emotional function and mastery domains).