Table 4. Independent predictors of ICU length of stay among survivors by multiple regression analysis.
| Independent variables | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
| β-coefficient | p value | β-coefficient | p value | |
| Age | -0.03 | 0.022 | -0.06 | <0.001 |
| Sex | 0.42 | 0.322 | ||
| APACHE II score | 0.16 | <0.001 | 0.16 | <0.001 |
| ECOG grade | 0.78 | <0.001 | 0.56 | 0.004 |
| Closed unit model | -1.20 | 0.005 | -1.88 | <0.001 |
| ICU admission diagnosis | ||||
| Respiratory | 2.24 | <0.001 | 2.35 | <0.001 |
| Cardiovascular | 0.30 | 0.579 | ||
| Acute kidney injury | 0.31 | 0.604 | ||
| Sepsis | 1.40 | 0.034 | 1.46 | 0.022 |
| Neurologic | 1.68 | 0.106 | ||
*ICU: Intensive Care Unit, APACHE II score: Acute Physiology and Chronic Health Evaluation II score, RRT: Renal Replacement Therapy.