Table 2: APACHEII and APACHE IV Predicted Outcome vs. Observed Outcome Cross Tabulation
|
Outcome |
Total |
Non-survival (N) |
Survival (N) |
APACHE II Prediction |
Non-survival |
90 |
19 |
109 |
Survival |
81 |
61 |
142 |
APACHE IV Prediction |
Non-survival |
89 |
19 |
108 |
Survival |
82 |
61 |
143 |
Observed |
171 |
80 |
251 |
Observed mortality rate 68.1
APACHE II predicted mortality rate 43.4%
APACHE IV predicted mortality rate 43%
APACHE II: Sensitivity=52.6%, Specificity=76.3%, Cut off value=24.5
APACHE IV: Sensitivity=52%, Specificity=76.2%, Cut off value=90.5