Figure 2From: Long-acting beta-agonists reduce mortality of patients with severe and very severe chronic obstructive pulmonary disease: a propensity score matching studyPrescription of LABA (long-acting beta-agonist) during follow-up. On 0 month, there were 292 LABA (−) patients and 299 LABA (+) patients in the pre-matching cohort; and 246 LABA (−) patients and 246 LABA (+) patients in the propensity matched cohort.Back to article page