Univariate and multivariate linear regression analyses: variables of table 2 showing a significance of p<0.10 were taken in the multivariate model
| Univariate | Multivariate | |||
| Beta | p Value | Beta | p Value | |
| Age (years) | 0.013 | 0.054 | ||
| EuroSCORE 1 logistic | 0.011 | 0.029 | ||
| STS | 0.037 | <0.001 | ||
| METs | −0.086 | 0.003 | −0.084 | 0.011 |
| Diastolic pressure (mm Hg) | −0.010 | 0.013 | −0.011 | 0.016 |
| Atrial fibrillation | 0.277 | 0.041 | ||
| Mitral regurgitation (II–IV) | 0.116 | 0.056 | ||
| Minimal right iliac diameter | −0.109 | 0.012 | ||
| Laboratory | ||||
| Haemoglobin | −0.111 | 0.055 | ||
| eGFR (MDRD) (mL/min/1.73 m2) | −0.004 | 0.077 | ||
| NT-proBNP | 0.00006 | 0.054 |
Length of stay is log-transformed to normalise the distribution.
eGFR, estimated glomerular filtration rate; EuroSCORE, European System for Cardiac Operative Risk Evaluation; MDRD, modification of diet in renal disease; METs, metabolic equivalent score; NT-proBNP, N-terminal prohormone brain natriuretic peptide; STS, Society of Thoracic Surgeons.