. Author manuscript; available in PMC: 2016 Dec 1.

Published in final edited form as: J Clin Neurophysiol. 2015 Dec;32(6):516–520. doi: 10.1097/WNP.0000000000000210

Table 3.

Multivariate Cox Regression Analysis

Variable	Hazard ratio	95% CI	P-value
SDNN <70	1.9	1.4–2.5	<0.001
Age (per year increase)	1.02	1.01–1.03	<0.001
Cancer stage			<0.001
No evidence of disease	0.1	0.1–0.2	<0.001
Localized cancer	0.5	0.3–0.6	<0.001
Advanced cancer	1.0	Ref	Ref
ECOG Performance status 0–2	0.4	0.3-0.5	<0.001

SDNN = standard deviation of all NN intervals; ECOG: Eastern Cooperative Oncology Group