Abstract
In a recent meta-analysis we evaluated the effectiveness of prophylactic intra-aortic balloon pump (IABP) support in patients at high-risk PCI (HR-PCI) on 7 randomized controlled trials (RCTs) and 4 Observational studies (Obs.) [1]. The primary endpoint was the in-hospital mortality and the composite of major adverse cardiac and cardiovascular events (MACCE) was considered the secondary endpoint. Data on MACCE were available only in 5 RCTs and in 3 Obs. The best level of evidence coming from RCTs was in agreement with the results obtained from Obs., as showed by the test for subgroup differences which always showed a value of I2 equal to zero, for both RR and RD, on the primary and the secondary endpoints [1].
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