Table 2.
Cox regression analysis of the identification of risk factors of hospital death within 90 days after intensive care unit admission
| Variable | Adjusted risk ratio | 95% confidence interval | P value |
|---|---|---|---|
| A. Analysis adjusted with APACHE II score | |||
| Age | 1.00 | 0.99–1.01 | 0.96 |
| Male sex | 1.43 | 1.01–2.05 | 0.042 |
| Interleukin-6 level (per tertile) | 1.09 | 0.88–1.35 | 0.42 |
| Chronic kidney disease | 0.77 | 0.51–1.12 | 0.17 |
| APACHE II score | 1.06 | 1.04–1.08 | < 0.0001 |
| Etiology | |||
| Cardiovascular disease | reference | – | – |
| Sepsis | 1.16 | 0.75–1.84 | 0.51 |
| All other etiologies | 1.40 | 0.89–2.22 | 0.14 |
| B. Analysis adjusted without APACHE II score | |||
| Age | 1.00 | 0.99–1.01 | 0.62 |
| Male sex | 1.41 | 1.00–2.02 | 0.051 |
| Interleukin-6 level (per tertile) | 1.28 | 1.04–1.58 | 0.018 |
| Chronic kidney disease | 0.86 | 0.57–1.26 | 0.44 |
| Etiology | |||
| Cardiovascular disease | reference | – | – |
| Sepsis | 0.87 | 0.57–1.36 | 0.53 |
| All other etiologies | 1.05 | 0.68–1.66 | 0.83 |
APACHE Acute physiology and chronic health evaluation
Risk ratio associated with a one-unit change in age, interleukin-6 level (per tertile), and APACHE II score, and associated with positive findings for other variables