Table 3.
Model | Internal validation (fivefold cross-validation on the training set) | External validation on the validation set | |||||
P value of Hosmer–Lemeshow test | Area under the ROC curve | Hosmer–Lemeshow test | Area under the ROC curve | ||||
Mean | Standard deviation | Mean | Standard deviation | Test statistic C | P value | ||
Original SAPS II | 0.001 | 0.001 | 0.8591 | 0.0058 | 1162.9 | <0.0001 | 0.8575 |
Customized SAPS II | 0.6280 | 0.1422 | 0.8562 | 0.0058 | 6.41 | 0.7794 | 0.8575 |
Expanded SAPS II | 0.2754 | 0.3832 | 0.8797 | 0.0054 | 6.04 | 0.8116 | 0.8787 |
ROC, receiver operating characteristic; SAPS, Simplified Acute Physiology Score.