Fig. 4From: A randomised controlled trial of non-invasive ventilation compared with extracorporeal carbon dioxide removal for acute hypercapnic exacerbations of chronic obstructive pulmonary diseaseChange in dyspnoea and discomfort according to the visual analogue scale where 0 is least dyspnoeic/uncomfortable and 100 is most dyspnoeic/uncomfortable (§ p<0.05 difference between measurement and baseline within in the ECCO2R group)Back to article page