JAMA - Kidney Function after CABG

"Kidney Function After Off-Pump or On-Pump Coronary Artery Bypass Graft Surgery"
http://jama.jamanetwork.com/article.aspx?articleid=1877182
"Conclusions and Relevance  Use of off-pump compared with on-pump CABG surgery reduced the risk of postoperative acute kidney injury, without evidence of better preserved kidney function with off-pump CABG surgery at 1 year. In this setting, an intervention that reduced the risk of mild to moderate acute kidney injury did not alter longer-term kidney function."