Variables | Univariate analysis | Multivariate analysis | ||||
---|---|---|---|---|---|---|
 | P value | OR | 95% CI | P value | OR | 95%CI |
ASA score | 0.012 | 2.872 | 1.262–6.539 | 0.051 | 2.347 | 0.998–5.518 |
BMI | 0.008 | 1.246 | 1.060–1.465 | 0.035 | 1.195 | 1.012–1.412 |
Revision surgery | 0.004 | 3.630 | 1.509–8.733 | 0.022 | 2.901 | 1.164–7.233 |