Long-term survival is lower in off pump versus on pump CABG patients reports a study of 5203 patients published in JACC.

Long-term survival following coronary artery bypass grafting: off-pump versus on-pump strategies JACC – Journal of the American College of Cardiology, 04/18/2014  Evidence Based Medicine  Clinical Article
 
Although several large–scale clinical trials have compared the surgical outcomes between off–pump and on–pump CABG, the long–term survival has not been compared between the two surgical strategies in a reasonably sized cohort. To compare long–term survival after off–pump and on–pump coronary artery bypass grafting (CABG). In patients undergoing elective isolated CABG, on–pump strategy conferred a long–term survival advantage compared with off–pump strategy.
Methods

Authors evaluated long–term survival data in 5203 patients (aged 62.9±9.1 years, 1340 females) who underwent elective isolated CABG (off–pump, n=2333; on–pump, n=2870) from 1989 through 2012.
Vital statuses were validated from Korean National Registry of Vital Statistics.
Long–term survival was compared with the use of propensity scores and inverse–probability–weighting to adjust selection bias.

 
Results

Patients undergoing on–pump CABG had higher number of distal anastomoses than those undergoing off–pump CABG (3.7±1.2 vs. 3.0±1.1, P