23 1 Aged 1 BITA 1 CABG 1 CI 1 Chi-Square Distribution 1 Coronary Artery Bypass, Off-Pump 1 Disease-Free Survival 1 European System for Cardiac Operative Risk Evaluation 1 Female 1 Follow-Up Studies 1 HR 1 Humans 1 IQR 1 ITA 1 Internal Mammary-Coronary Artery Anastomosis 1 Kaplan-Meier Estimate 1 LAD 1 LITA 1 Logistic Models 1 Male 1 Middle Aged 1 Multivariate Analysis 1 OPCAB 1 OR 1 Odds Ratio 1 Patient Readmission 1 Postoperative Complications 1 Propensity Score 1 Proportional Hazards Models 1