Demographic characteristics
| % | % | % | % | % | |
Female | 28.8 | 29.5 | 30.5 | 29.9 | 27.8 | 0.4752 |
65–69 | 20.5 | 21.3 | 19.7 | 18.1 | 18.5 | 0.0009 |
70–75 | 23.3 | 21.6 | 22.4 | 23.7 | 23.0 | 0.4801 |
75–80 | 14.5 | 17.2 | 17.2 | 19.5 | 18.5 | <0.0001 |
>80 | 3.2 | 4.3 | 5.2 | 5.4 | 6.6 | <0.0001 |
Age (mean) | 65.8 | 66.6 | 66.7 | 67.3 | 67.4 | <0.0001 |
Comorbidity conditions
| % | % | % | % | % | |
Diabetes | 14.7 | 16.6 | 19.8 | 20.6 | 20.4 | <0.0001 |
Chronic obstructive lung disease | 0.6 | 0.8 | 0.6 | 0.7 | 0.6 | 0.6553 |
Congestive heart failure | 19.6 | 18.1 | 19.3 | 20.7 | 18.7 | 0.7573 |
Cerebrovascular disease | 3.2 | 4.0 | 4.4 | 4.7 | 4.3 | 0.0104 |
Peripheral vascular disease | 10.5 | 11.6 | 10.8 | 12.1 | 12.3 | 0.0217 |
Renal failure in previous admissions | 2.3 | 2.6 | 2.5 | 2.3 | 2.1 | 0.4233 |
Absence of comorbidity
| 36.8 | 36.5 | 36.4 | 35.9 | 39.1 | 0.1028 |
Admission
| % | % | % | % | % | |
Elective | 93.0 | 81.5 | 77.6 | 78.6 | 76.0 | |
Urgent | 7.0 | 18.5 | 22.4 | 21.4 | 24.0 | <0.0001 |
High risk clinical conditions
| % | % | % | % | % | |
Diagnosis of AMI | 1.0 | 1.3 | 0.7 | 0.8 | 0.8 | 0.1026 |
Cardiac catheterisation on same day of surgery | 2.1 | 0.5 | 0.1 | 0.3 | 0.6 | <0.0001 |
PTCA on same day of surgery | 0.3 | 0.4 | 0.8 | 0.4 | 0.9 | 0.0036 |
Intra-aortic balloon pump before surgery | 0.2 | 0.3 | 0.2 | 0.4 | 0.6 | 0.0171 |
Euroscore (mean)
| NA | NA | 5.1 | 5.3 | 5.6 | <0.0001 |
Type of surgery
| % | % | % | % | % | |
CABG alone | 66.3 | 64.7 | 61.9 | 61.7 | 59.6 | <0.0001 |
Valve alone | 21.3 | 20.9 | 22.5 | 22.1 | 22.4 | 0.1333 |
CABG+valve | 7.9 | 8.9 | 9.4 | 10.6 | 11.3 | <0.0001 |
Other cardiac surgery | 4.6 | 5.5 | 6.1 | 5.6 | 6.7 | 0.0008 |
Length of stay (mean)
| 13.6 | 13.4 | 14.1 | 14.0 | 14.4 | 0.0002 |