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Table 2 Details and complications of 4714 coronary artery bypass procedures in relation to timing of surgery

From: Variation of mortality after coronary artery bypass surgery in relation to hour, day and month of the procedure

 

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