Table 4.
Risk factor analysis for operative mortality
| Variable | Univariable analysis p-value | Multivariable analysis | |
|---|---|---|---|
|
| |||
| Odds ratio (95% CI) | p-value | ||
| Sex (female) | 0.072 | 4.914 (1.081–22.222) | 0.039 |
| Age | 0.493 | ||
| STS score | 0.494 | ||
| EuroSCORE II | <0.001 | 1.229 (1.112–1.359) | <0.001 |
| FI-La) | 0.054 | - | - |
| Hypertension | 0.817 | ||
| Diabetes mellitus | 0.350 | ||
| Dyslipidemia | 0.973 | ||
| History of stroke | 0.937 | ||
| Peripheral vascular disease | 0.072 | 4.791 (1.032–22.235) | 0.045 |
| Chronic obstructive pulmonary disease | >0.999 | ||
| Atrial fibrillationa) | 0.017 | - | - |
| Left ventricular dysfunction (EF <35%)a) | 0.012 | - | - |
| History of coronary intervention | >0.999 | ||
| Acute coronary syndrome | 0.361 | ||
| On-pump beating CABG | 0.999 | ||
| Use of the left internal thoracic artery | 0.999 | ||
| No. of anastomoses | 0.457 | ||
CI, confidence interval; STS, Society of Thoracic Surgeons; EuroSCORE II, European System for Cardiac Operative Risk Evaluation II; FI-L, frailty index based on laboratory data and vital signs; EF, ejection fraction; CABG, coronary artery bypass grafting.
a)Variables were included in the multivariable analysis but were dropped during stepwise analysis.