Fig. 2From: Long-acting antimuscarinic therapy in patients with chronic obstructive pulmonary disease receiving beta-blockersKaplan–Meier plot (a) and Cox regression analysis (b) of all-cause mortality. Cox proportional hazards model with baseline CV risk group, smoking status, treatment group and baseline beta-blocker use as factors. Interaction P = 0.35. CI confidence interval, CV cardiovascular, HR hazard ratio, N total number of patients, n total number of patients experiencing eventBack to article page