Variables recorded in the administrative database (HDR) and the clinical database (NVT)
| Administrative variables | N (%) N=26 178 | OR in updated model | Clinical variables | N (%) N=26 178 | OR in updated model |
|---|---|---|---|---|---|
| Age <25 years (categories of 5 years up to >85 years) | 66.5 (± 10.7) | Reference 0.29–1.01 | Age (continuous) | 66.6 (±10.7) | 1.06*** |
| Female sex | 7714 (29.5) | 1.44*** | Female sex | 7714 (29.5) | 1.33*** |
| Acute myocardial infarction | 1899 (7.3) | 1.25 | Recent myocardial infarction (<90 days) | 3191 (12.2) | 1.57*** |
| Congestive heart failure | 696 (2.7) | 4.11*** | LVEF 30–50% | 4165 (15.9) | 1.69*** |
| LVEF <30% | 1324 (5.1) | 2.95*** | |||
| Pulmonary disease | 623 (2.4) | – | Pulmonary disease | 3019 (11.5) | 1.79*** |
| Renal disease | 293 (1.1) | 3.62*** | Serum creatine >200 μmol/L | 464 (1.8) | 2.79*** |
| Urgency | 3292 (12.6) | 2.20*** | Emergency operation | 1317 (5.0) | 2.38*** |
| Peripheral vascular disease | 551 (2.1) | 2.17*** | Extracardiac arteriopathy | 3202 (12.2) | 1.83*** |
| Cerebral vascular accident | 241 (0.9) | 2.75*** | Neurological dysfunction | 780 (3.0) | 1.26 |
| Peptic ulcer | 51 (0.2) | 4.36*** | Previous cardiac surgery | 1709 (6.5) | 2.78*** |
| Social economic status | Systolic pulmonary pressure >60 mm Hg | 606 (2.3) | 1.97*** | ||
| Lowest | 5450 (16.5%) | Reference | |||
| Below average | 5379 (16.3%) | 0.89 | Active endocarditis | 216 (0.8) | 1.45 |
| Average | 4999 (15.1%) | 0.79* | Unstable angina | 15 776 (6.0) | 1.95*** |
| Above average | 5801 (17.5%) | 0.70** | Critical preoperative state | 983 (3.8) | 2.51*** |
| Highest Unknown | 4541 (13.7%) 6925 (20.9%) | 0.95 | Ventricular septal rupture | 47 (0.2) | 3.93*** |
| Year of discharge | Other than isolated CABG | 11 809 (45.1) | 3.43*** | ||
| 2007 | 6829 (20.6%) | reference | Thoracic aortic surgery | 1258 (4.8) | 2.75*** |
| 2008 | 6697 (20.2%) | 1.04 | |||
| 2009 | 6941 (21.0%) | 0.83 | |||
| 2010 Unknown | 5711 (17.3%) 6917 (20.9%) | 0.69*** | |||
| Admission from | |||||
| Home | 19 907 (60.2%) | reference | |||
| Nursing home | 145 (0.4%) | 3.41*** | |||
| General hospital | 4952 (15.0%) | 1.27** | |||
| Academic centre Unknown | 1174 (3.5%) 6917 (20.9%) | 1.38* | |||
For dichotomous variables the number of patients and percentage of total population is reported; for continuous variables the mean and standard deviation. *p<0.05; **p<0.01; ***p<0.001.
LVEF, left ventricular ejection fraction.