Seven non randomised studies were included in the review (n=2,841 patients, range 270 to 1,084). Duration of follow-up ranged from two the three years.
There was a significant increase in mortality for percutaneous coronary stenting compared with coronary artery bypass grafting (HR 1.35, 95% CI 1.04 to 1.75; I2=42%; seven studies).
The percentage of patients that underwent off-pump coronary artery bypass grafting was significantly associated with impaired coronary artery bypass grafting treatment estimates.
There was no evidence of publication bias.