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.