Research Article
Risk Prediction of One-Year Mortality in Patients with Cardiac Arrhythmias Using Random Survival Forest
Table 3
Cox proportional hazard model with comprehensive risk factors.
| Predictors | Coefficient | value | HR | 95.0% CI | Lower | Upper |
| Demographics | | | | | | log age | .633 | <0.001 | 1.883 | 1.637 | 2.167 | log BMI | −.979 | <0.001 | .376 | .313 | .451 | Clinical risk factors | | | | | | Cardiac arrest | .890 | <0.001 | 2.435 | 2.164 | 2.741 | Slow arrhythmias | −.420 | <0.001 | 0.657 | 0.572 | 0.755 | CHF | .119 | 0.002 | 1.126 | 1.042 | 1.216 | Myocardial infraction | .168 | 0.001 | 1.182 | 1.069 | 1.307 | Stroke | .340 | <0.001 | 1.405 | 1.266 | 1.560 | Renal failure | .243 | <0.001 | 1.275 | 1.132 | 1.437 | Laboratory risk factors | | | | | | log K | −1.146 | <0.001 | .318 | .256 | .395 | log WBC | .266 | <0.001 | 1.305 | 1.210 | 1.408 | log RBC | −.443 | 0.001 | .642 | .494 | .834 | log BUN | .562 | <0.001 | 1.754 | 1.605 | 1.916 | log glucose | .187 | 0.002 | 1.205 | 1.071 | 1.356 | log CKPK | −.106 | <0.001 | .900 | .872 | .928 | log AST | .379 | <0.001 | 1.460 | 1.357 | 1.572 | log ALT | −.255 | <0.001 | .775 | .722 | .832 | log PT | −.447 | <0.001 | .640 | .523 | .782 | log INR | .334 | <0.001 | 1.397 | 1.228 | 1.590 | log BR | .107 | <0.001 | 1.113 | 1.062 | 1.165 | Medications | | | | | | Class I agents | 0.376 | 0.002 | 1.456 | 1.147 | 1.849 | Class II agents | −0.316 | <0.001 | 0.729 | 0.670 | 0.793 | Class III agents | −0.864 | <0.001 | 0.421 | 0.352 | 0.505 | Class V agents | −0.203 | <0.001 | 0.816 | 0.754 | 0.883 |
|
|
HR: hazard ratio; CI: confidence level; log indicates log of variables.
|