Table 2.

Details and complications of 4714 coronary artery bypass procedures in relation to timing of surgery

	All patients n = 4714	Weekday n = 4661	Weekend n = 53	p value weekday vs. weekend	7 am-4 pm n = 2624	After 4 pm n = 65	p value 7 am-4 pm vs. after 4 pm
Urgent/emergent surgery	21%	20%	91%	< 0.0001	15%	68%	< 0.0001
Number grafts	3 ± 1	3 ± 1	3 ± 1	0.15	3.1 ± 0.9	2.9 ± 1	0.18
bypass time (min)	123 ± 45	123 ± 45	111 ± 34	0.16	123 ± 45	112 ± 47	0.055
ischemic time (min)	80 ± 30	80 ± 30	73 ± 24	0.25	80 ± 30	74 ± 33	0.14
Operative mortality	2.6%	2.5%	9.4%	0.01	2.2%	6.2%	0.04
Stroke	1.6%	1.6%	1.9%	0.59	1.6%	6%	0.02
Reoperation for bleeding	3%	3%	4%	0.66	2%	11%	< 0.0001
Ventilated > 48 hours	7%	7%	19%	0.001	7%	20%	< 0.0001
Any complication	12%	12%	28%	< 0.0001	13%	28%	< 0.0001