Table 5.
Multivariable logistic regression analysis for death within 30 days after surgery.
| Variables | Wald x 2 | P value | RR | 95% CI |
|---|---|---|---|---|
| Age group | 19.722 | <0.001 | ||
| Age ≤45 years (Ref.45–60) | 2.989 | 0.084 | 0.398 | 0.140–1.131 |
| Age ≥60 years (Ref.45–60) | 11.674 | 0.001 | 2.843 | 1.561–5.176 |
| BMI group | 15.460 | <0.001 | ||
| BMI ≤18.5 kg/m2 (Ref. 18.5–24) | 13.726 | <0.001 | 4.590 | 2.050–10.279 |
| BMI ≥24 kg/m2 (Ref. 18.5–24) | 0.045 | 0.832 | 0.932 | 0.486–1.788 |
| NYHA class | 11.212 | 0.004 | ||
| III (Ref. II) | 1.056 | 0.304 | 1.755 | 0.600–5.128 |
| IV (Ref. II) | 6.758 | 0.009 | 4.544 | 1.451–14.226 |
| CPB time, min | 31.835 | <0.001 | 1.014 | 1.009–1.019 |
| NLR group (Ref. ≤3.5) | 14.627 | <0.001 | 3.236 | 1.773–5.906 |
BMI, body mass index; NYHA, New York Heart Association; CPB, cardiopulmonary bypass; NLR, neutrophil-to-lymphocyte ratio; RR, relative risk; CI, confidence interval.