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Risk stratification of patients based on gradient boosting tree.
| Risk group | Observed probability (%) | Actual probability (n = 1,607) | p-value a |
|---|---|---|---|
| Low risk (≦20.00%) | 8.14 | 7.50% (87/1,160) | <0.001 |
| High risk (>20.00%) | 42.08 | 46.31% (207/447) |
indicates a comparison of actual probability between low-risk and high-risk groups using Chi-square test.
