Figure 4From: Budesonide/formoterol as effective as prednisolone plus formoterol in acute exacerbations of COPD A double-blind, randomised, non-inferiority, parallel-group, multicentre study Time to first exacerbation during the open-label treatment period. Day 0 corresponds to the end of the double-blind treatment period. The groups shown represent the treatment arms for the double-blind treatment period.Back to article page