Limitations
The primary limitation of the present study is the associated potential
for treatment selection bias. The patients who underwent PCI were
selected on the basis of favorable coronary anatomy for this procedure,
which is an important selection bias. Also, all patients had
single-vessel coronary artery disease with normal left ventricular
ejection fractions, and few or no comorbidities. High risk patients were
excluded from this study.
The follow-up of the patients was limited to 1 year, and thus no
statement may be made regarding long-term differences in outcomes, as
might be expected when comparing PCI and CABG.