Table 4.
Risk stratification of patients in the validation cohorts based on the final machine learning model.
| Risk group | Patients | Likelihood of PerCI | P a | |
|---|---|---|---|---|
| Predicted | Actual | |||
| Internal validation cohort | ||||
| Low-risk group (<18.40%) | 128 | 8.44% | 3.13% (4/128) | <0.001 |
| High-risk group (≥18.40%) | 94 | 29.44% | 31.91% (30/94) | |
| External validation cohort | ||||
| Low-risk group (<18.40%) | 53 | 10.14% | 13.21% (7/53) | 0.001 |
| High-risk group (≥18.40%) | 60 | 29.77% | 40.00% (24/60) | |
a
indicates A comparison of actual probability between the low-risk and high-risk groups in the internal and external validation cohorts using the Chi-Square test.
PerCI, persistent critical illness.