From: Effect of beta-blockers on exacerbation rate and lung function in chronic obstructive pulmonary disease (COPD)
Statcope
N
Exacerbation rate per person-year (95% CI)
+BB
63
1.14 (0.81,1.46)
−BB
625
1.34 (1.22,1.46)
Macro
107
1.72 (1.37,2.08)
424
1.71 (1.53,1.88)