Risk Prediction of One-Year Mortality in Patients with Cardiac Arrhythmias Using Random Survival Forest

Figure 1

Minimal depth from RSF analysis. Horizontal line is threshold for separating predictive variables that are below the line. The diameter of each circle is in proportion to the forest-averaged number of maximal subtrees for that variable: 1: cardiac arrest, 2: log of BUN, 3: log of BMI, 4: log of AST, 5: log of age, 6: log of SCR, 7: log of BR, 8: log of K, 9: log of WBC, 10: log of ALT, 11: log of NA, 12: log of CKPK, 13: class II agents, 14: log of glucose, 15: log of INR, 16: CHF, 17: renal failure, 18: log of RBC, 19: log of PTT, 20: class V agents, 21: log of PT, 22: stroke, 23: sex, 24: AF, 25: class IV agents, 26: myocardial infarction, 27: hypertension, 28: uncomplicated diabetes, 29: valvular heart disease, 30: slow arrhythmias, 31: VT, 32: VF, 33: hypothyroidism, 34: complicated diabetes, 35: class III agents, 36: liver disease, 37: chronic pulmonary heart disease, 38: acute pulmonary heart disease, 39: class I agents, 40: bundle branch block.