Fig. 4From: Dual versus monotherapy with bronchodilators in GOLD group B COPD patients according to baseline FEV1 level: a patient-level pooled analysis of phase-3 randomized clinical trialsDifference between dual therapy vs. monotherapy in time to first exacerbation. CI confidence interval, GOLD Global initiative for Chronic Obstructive Lung Disease, LABA long-acting beta-2 agonist, LAMA long-acting muscarinic antagonistBack to article page