Table 3.
Evaluation of independent predictors for the occurrence of AKI.
| Independent variables | Univariate | Multivariate | ||
|---|---|---|---|---|
| OR (95% CI) | p-value | OR (95% CI) | p-value | |
| Prior deterioration of renal function* | 10.1 (1.3–15.8) | 0.033 | 15.4 (1.3–17.8) | 0.026 |
| Procedure time | 1.03 (1.05–3.5) | 0.011 | 1.03 (1.04–3.8) | 0.024 |
| Intra-operative drop in SBP of ≥20% | 1.77 (1.2–4.7) | 0.001 | 1.72 (1.1–5.1) | 0.003 |
| Intra-operative bleeding† | 7.86 (1.6–8.9) | 0.009 | 5.45 (0.95–6.6) | 0.081 |
CI Confidence interval, AKI acute kidney injury, GFR glomerular filtration rate, NT-proBNP N-terminal prohormone of brain natriuretic peptide, SBP systolic blood pressure.
Non-significant co-variates included in each regression model were: 1) Age on admission, 2) Gender, 3) LVEF on admission, 4) NYHA functional class on admission.
*
Defined as GFR < 60 ml/min/1.73 m2 on admission, †Defined as defined as ≥2 g/dl decrease in hemoglobin concentration or necessity of red blood cell transfusion.