How decisive is the number of distal arterial anastomoses in coronary bypass surgery?

Table 3 Variables influencing mortality by univariable analysis in all patients and in the sub-group of patients with 3-vessel disease and at least two arterial grafts

	All Patients		Sub-group
Predictor	HR (95% CI)	P Value	HR (95% CI)	P Value
Preoperative
Age	1.077 (1.068–1.086)	0.0001	1.070 (1.059–1.080)	0.0001
Male gender	0.868 (0.759–0.994)	0.031	1.114 (0.854–1.454)	0.425
Heart Failure NYHA ≥ 2	1.122 (1.008–1.249)	0.035	1.546 (1.350–1.771)	0.0001
Diabetes	1.302 (1.025–1.656)	0.031	1.314 (1.006–1.717)	0.045
3-vessel disease	1.040 (0.902–1.198)	0.591	NA
LV ejection fraction	0.986 (0.980–0.993)	0.0001	0.983 (0.976–0.990)	0.0001
Intraoperative
Complete revascularization	0.713 (0.609–0.834)	0.0001	0.730 (0.612–0.871)	0.0001
Number arterial anastomoses	0.726 (0.678–0.778)	0.0001	0.838 (0.746–0.941)	0.003
Number arterial grafts	0.710 (0.646–0.780)	0.0001	1.044 (0.875–1.244)	0.634
Both ITA	0.534 (0.463–0.616)	0.0001	0.784 (0.511–1.202)	0.264
Sequential ITA	0.592 (0.518–0.678)	0.0001	0.688 (0.579–0.818)	0.0001
GEA graft	0.861 (0.746–0.993)	0.040	1.085 (0.913–1.290)	0.353
Associated vein graft	1.031 (0.878–1.211)	0.710	0.877 (0.727–1.059)	0.173

HR Hazard ratio, CI Confidence interval, NYHA New York heart association, NA Non appropriate, LV Left ventricular, ITA Internal thoracic artery, GEA Gastroepiploic artery

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