Descriptive baseline data of the seven primary care UNLOCK datasets, compared with baseline data of six large pharmaceutically sponsored COPD studies.

Results are means, unless otherwise noted. “-“ indicates data not available. *indicates Pre-bronchodilator values. Note: In TORCH, UPLIFT, POET-COPD, TRISTAN mean data for total group were not published, we used the following baseline data: POET-COPD: Tiotropium group; UPLIFT: Tiotropium group; ECLIPSE: total group; TORCH: combination therapy group; TRISTAN: Salmeterol/Fluticasone group; ISOLDE: Fluticasone group. Abbreviations: NL: Netherlands; UK: United Kingdom; GR: Greece; SW: Sweden; 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.