Table 4. Result of Univariate and Multivariate regression analysis of risk factors for ICU mortality.
| Univariate analysis | Multivariate analysis | ||||
|---|---|---|---|---|---|
| Risk factors | OR | p-value | OR | CI | p-value |
| ICU-aquired infection | 8.2 | 0.004 | 3.83 | 1.082–13.522 | 0.04 |
| LOS < 7days before infection | 4.9 | 0.05 | 0.65 | 0.190–2.208 | 0.49 |
| Endotracheal intubation | 5.7 | 0.004 | 2.7 | 0.576–13.165 | 0.21 |
| Urethral catheterization | 7.5 | 0.004 | 1.79 | 0.107–29.857 | 0.69 |
| APACHE II score | 9.04 | 0.000 | - | - | - |
| Location before admission | 1.9 | 0.17 | 2.2 | 0.708–6.501 | 0.18 |
| Age | 1.7 | 0.28 | |||
| Gender | 0.63 | 0.32 | |||
| Use of antibiotic one month before admission | 0.77 | 0.58 | |||
| Surgery one month before admission | 0.50 | 0.24 | |||
| Malignancy | 1.5 | 1.00 | |||
| Nasogastric intubation | 0.97 | 0.97 | |||
| LOS > 7 days | 0.81 | 0.66 | |||
KEY: LOS = Length of ICU stay; OR = Odds ratio; CI = Confidence interval
[-2loglikelihood 77.170; p(Hosmer & Lemeshow test) = 0.88] only for the Multivariate analysis