Table 3.

Cox proportional hazard analysis for individual variables and their effect on recurrence of patient pain

Factors	Category	Hazard ratio (95% confidence interval)	P-value
Age (years)		1.00 (0.99, 1.01)	0.77
Sex (male)	Male	0.99 (0.87, 1.13)	0.91
Ethnicity (Caucasian)	Caucasian	0.96 (0.84, 1.11)	0.55
Treatment group	Advanced	0.83 (0.71, 0.96)	0.01
(Advanced Australian)	Australian
Preablation VNS		1.04 (0.97, 1.12)	0.25
Pain medication (No)	No	0.91 (0.78, 1.06)	0.23

Abbreviation: VNS, visual numeric scale.