Table 2

 Multivariate analysis for factors associated with mortality

Odds ratio (95% CI)p Value
*A patient was coded as having immunosuppression if there was either disease sufficiently advanced to suppress resistance to infection (eg, leukaemia, lymphoma, AIDS) or if he/she had received treatment that suppresses resistance to infection (eg, immunosuppressive drugs, chemotherapy, radiation, long-term or recent high-dose steroids).
Age1.04 (1.02 to 1.06)<0.0001
Urea1.06 (1.03 to 1.10)<0.001
Glasgow coma score0.89 (0.83 to 0.96)0.001
Immunosuppression*5.04 (1.64 to 15.49)0.005
Mechanical ventilation3.46 (1.36 to 8.82)0.009
Mean blood pressure0.98 (0.97 to 0.99)0.012
Arterial pH0.10 (0.01 to 0.99)0.048