Fig. 2From: Effect of COPD severity and comorbidities on the result of the PHQ-9 tool for the diagnosis of depression: results from the COSYCONET cohort studyEffect of symptoms and exacerbations on the PHQ-9 sum score. The figure depicts the amounts of the additive effects, corresponding to a mean increase by 2.75 points in patients with high symptom burden and by 1.44 points in patients with high exacerbation riskBack to article page