Table 1

Patient characteristics by development of new-onset atrial fibrillation (AF)

CharacteristicNew-onset AF
3312 (29.5%)
No AF
7927 (70.5%)
P value
Study site <0.0001
 Baylor*1797 (33.1%)3629 (66.9%)
 Emory565 (24.6%)1733 (75.4%)
 University of Virginia418 (20.5%)1621 (79.5%)
 Washington University532 (36.0%)944 (74.0%)
Age†67.5±9.561.3±10.6 <0.0001
Body mass index† (kg/m2)29.6±6.929.4±5.8 0.54
Male2484 (30.2%)5730 (69.8%) <0.01
Female827 (27.4%)2195 (72.6%)
Race <0.0001
 White2824 (31.5%)6127 (68.5%)
 Black295 (20.6%)1137 (79.4%)
 Hispanic101 (23.8%)324 (76.2%)
 Asian41 (20.7%)157 (79.3%)
 Other51 (21.9%)182 (78.1%)
Diabetes mellitus1397 (30.7%)3153 (69.3%) 0.06
Renal failure104 (32.0%)221 (68.0%) 0.33
Creatinine (mg/dL)†1.3±1.21.2±1.2 <0.0001
Chronic lung disease752 (33.8%)1475 (66.2%) <0.0001
Systemic hypertension2860 (30.0%)6671 (70.0%) <0.01
Peripheral vascular disease759 (35.2%)1399 (64.8%) <0.0001
Cerebrovascular disease678 (35.7%)1220 (64.3%) <0.0001
Time from last myocardial infarction to surgery <0.0001
 No myocardial infarction
 ≤6 hours
1690 (27.8%)
32 (34.8%)
4396 (72.2%)
60 (65.2%)
 >6 but<24 hours83 (32.5%)172 (67.5%)
 ≥24 hours1507 (31.4%)3299 (68.6%)
Current smoker750 (23.9%)2382 (30.0%) <0.0001
Congestive heart failure855 (33.9%)1666 (66.1%) <0.0001
Previous PCI960 (30.4%)2194 (69.6%) 0.21
Previous coronary bypass167 (30.8%)376 (69.2%) 0.54
Previous valve surgery123 (38.0%)201 (62.0%) <0.001
Preoperative angina pectoris2051 (28.9%)5054 (71.1%) 0.04
Preoperative ejection fraction† (%)48.4±14.149.5±13.1 <0.01
Left main disease936 (33.6%)1854 (66.5%) <0.0001
Operation
 Elective2055 (30.2%)4749 (69.8%) 0.03
 Non-elective1257 (28.3%)3178 (71.7%)
 Off-pump1060 (26.4%)2961 (73.6%) <0.0001
 On-pump2252 (31.2%)4966 (68.8%)
Preoperative IABP562 (36.9%)963 (63.1%) <0.0001
  • *Two Baylor sites participated in the study: one academic medical centre and one high-volume specialty cardiac hospital.

  • †Mean ±SD.

  • IABP, intra-aortic balloon pump; PCI, percutaneous coronary intervention.