Baseline comparison of the UNLOCK studies versus large COPD studies, including independent sample t-tests.

Data are overall mean values (SD), in which every dataset or study contributed equally to the overall means. “-“ indicates data not available. 95% CI: 95% confidence interval. Abbreviations: BMI: body mass index; FEV1: forced expiratory volume in 1 second; GOLD: Global initiative for chronic Obstructive Lung Disease; SGRQ: St Georges Respiratory Questionnaire; CCQ: Clinical COPD Questionnaire; MRC: Medical Research Counsil.