Baseline clinical characteristics at time of CABG
| Variable, n (%) | XRT group (n=38) | Control group (n=141) | P value |
| Age, years | 67.9±11.4 | 67.5±11.0 | 0.54 |
| Male gender | 14 (37) | 52 (37) | 1.00 |
| Body mass index (mean±SD) | 28.6±7.0 | 29.7±5.5 | 0.22 |
| Diabetes mellitus | 8 (21) | 39 (28) | 0.41 |
| Hyperlipidaemia | 34 (89) | 127 (90) | 0.78 |
| Hypertension | 30 (79) | 121 (86) | 0.25 |
| Congestive heart failure | 5 (13) | 13 (9) | 0.47 |
| Left ventricular ejection fraction (mean %±SD) | 56.4±11.3 | 54.0±13.7 | 0.31 |
| Prior myocardial infarction | 7 (18) | 35 (25) | 0.56 |
| Prior PCI | 9 (24) | 30 (21) | 0.78 |
| Peripheral vascular disease | 5 (13) | 35 (25) | 0.09 |
| Pre-CABG creatinine (mean±SD, mg/dL) | 1.1±0.3 | 1.1±0.4 | 0.65 |
| Current or former tobacco use | 17 (45) | 76 (54) | 0.33 |
| Chronic obstructive pulmonary disease | 7 (18) | 24 (17) | 0.71 |
| Left main disease | 18 (47) | 62 (44) | 0.78 |
| Aortic cross clamp time (mean±SD) | 48±21 | 49±21 | 0.52 |
| Estimate STS risk (mean %,±SD) | 2.9±3.8 | 2.7±2.2 | 0.99 |
| Angina | 0.99 | ||
| No angina | 11 (29) | 41 (29) | |
| Stable angina | 19 (50) | 71 (50) | |
| Unstable angina/acute coronary syndrome | 8 (21) | 30 (21) | |
| Procedure | 0.002 | ||
| CABG only | 32 (84) | 139 (99) | |
| CABG plus ASD or PFO repair | 1 (3) | 1 (1) | |
| CABG plus pericardiectomy | 5 (13) | 1 (1) | |
| Urgency of CABG | 0.76 | ||
| Elective | 19 (50) | 64 (45) | |
| Urgent | 17 (45) | 74 (53) | |
| Emergent | 2 (5) | 3 (2) |
CABG, coronary artery bypass graft surgery; PCI, percutaneous coronary intervention; STS, Society of Thoracic Surgeons; XRT, radiation therapy; ASD, atrial septal defect; PFO, patent foramen ovale.