Multiple variable logistic regression analysis showing the association of in-hospital mortality with APACHE II, age, medical comorbidity, use of mechanical ventilation and admission during the intensivist-led MET (IL-MET) hours for all three study periods and from 1 January 2008 to 31 December 2009
| Predictor variables | OR (95% CI) | p Value |
| 1 July 2002–31 August 2004 | ||
| Admission during IL-MET hours | 0.97 (0.61 to 1.54) | 0.90 |
| APACHE II | 1.09 (1.06 to 1.13) | <0.001 |
| Age | 1.00 (0.99 to 1.02) | 0.65 |
| Mechanical ventilation | 1.02 (0.61 to 1.69) | 0.94 |
| At least one comorbidity | 1.62 (0.98 to 2.45) | 0.04 |
| 1 September 2004–11 February 2007 | ||
| Admission during IL-MET hours | 1.19 (0.80 to 1.77) | 0.39 |
| APACHE II | 1.10 (1.07 to 1.13) | <0.001 |
| Age | 1.02 (1.00 to 1.03) | 0.002 |
| Mechanical ventilation | 1.46 (0.92 to 2.31) | 0.11 |
| At least one comorbidity | 1.39 (0.92 to 2.09) | 0.11 |
| 12 February 2007–31 December 2009 | ||
| Admission during IL-MET hours | 0.73 (0.51 to 1.03) | 0.07 |
| APACHE II | 1.11 (1.08 to 1.13) | <0.001 |
| Age | 1.01 (1.00 to 1.02) | 0.008 |
| Mechanical ventilation | 1.33 (0.88 to 2.00) | 0.18 |
| At least one comorbidity | 1.43 (1.01 to 2.02) | 0.04 |
| 1 January 2008–31 December 2009 | ||
| Admission during IL-MET hours | 0.57 (0.38 to 0.87) | 0.01 |
| APACHE II | 1.12 (1.08 to 1.15) | <0.001 |
| Age | 1.02 (1.00 to 1.03) | 0.02 |
| Mechanical ventilation | 1.08 (0.66 to 1.75) | 0.76 |
| At least one comorbidity | 1.44 (0.95 to 2.18) | 0.08 |
APACHE, Acute Physiology and Chronic Health Evaluation.