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Frequency of major adverse cardiac events within one month of coronary angioplasty: a useful measure of operator performance

^a Section of Cardiology, the Washington Hospital Center, Washington, DC, USA

View larger version (11K): [in a new window]   Figure 1 The observed one-month event rate for each operator group is indicated by a star and is displayed against the expected rate with its 95% confidence intervals for both MACE (A) and additional revascularization (B). Notice that only the outcomes of the group of operators performing <50 cases annually fall outside the 95% confidence limits of the expected rate for their patient population. MACE = major adverse cardiac event.

View larger version (13K): [in a new window]   Figure 2 Scatter plots are shown demonstrating individual operator frequency of MACE (A) and of additional revascularization (B) at one month. Note the wide scatter in event rates for the operators performing <50 cases annually. MACE = major adverse cardiac event.

View larger version (37K): [in a new window]   Figure 3 Bar graphs depict the frequency of MACE (A) and additional revascularization (B) for the operator groups at one month and between one and six months. The difference between groups is apparent at one month. Event rates between one and six months are similar for all groups. MACE = major adverse cardiac event.