Fig. 3From: Effects of tiotropium + olodaterol versus tiotropium or placebo by COPD disease severity and previous treatment history in the OTEMTO® studiesAdjusted mean SGRQ total score at 12 weeks in patients with GOLD 2 and 3 disease. SGRQ: St George’s Respiratory Questionnaire; GOLD: Global initiative for chronic Obstructive Lung Disease; SE: standard error; T: tiotropium; O: olodaterolBack to article page