Table 2:

Results of hierarchical model predicting risk-adjusted dual antiplatelet use.

	OR	p-value
Off-pump surgery	4.48 (2.77–7.23)	<0.0001
Prior percutaneous coronary intervention	2.02 (1.63–2.49)	<0.0001
Aggregate hospital effect	1.93 (1.05–3.55)	0.0026
ADP Inhibitor with 5 days of Surgery	1.81 (1.38–2.38)	<0.0001
Peripheral arterial disease	1.72 (1.31–2.27)	0.0001
Prior stroke	1.52 (1.10–2.09)	0.0110
Aggregate surgeon effect	1.24 (0.68–2.27)	0.1784
Major morbidity	1.21 (0.84 −1.75)	0.2981
ST elevation myocardial infarction	1.12 (0.85–1.48)	0.4369
Predicted risk of morbidity or mortality	1.01 (1.00–1.02)	0.0109
Heart failure	0.99 (0.77–1.28)	0.9478
Patient age	0.98 (0.98–0.99)	0.0024
Post-operative length of stay	0.96 (0.94–0.98)	0.0003
Year	0.90 (0.81–1.00)	0.0505
Preoperative dialysis	0.76 (0.44–1.32)	0.3300
Transfusion	0.72 (0.56–0.93)	0.0103
Post-operative atrial fibrillation	0.64 (0.50–0.81)	0.0003
History of atrial fibrillation/flutter	0.39 (0.28–0.55)	<0.0001

(C-statistic 0.881) (ADP: adenosine diphosphate; CI: Confidence Interval; OR: Odds Ratio PCI: Percutaneous coronary intervention)