Fig. 3From: Health-related quality of life associates with change in FEV1 in COPD: results from the COSYCONET cohortRelationship between change in FEV1 and SGRQ (a), EQ VAS (b). Generalized additive models were adjusted for age, sex, BMI, education, smoking status, number of comorbidities, and exacerbation history. The solid curves represent the estimated smooth functions of the association between FEV1 and HRQL. The shaded areas indicate 95% confidence intervalsBack to article page