Table 3. Multivariate cox proportional hazards regression analysis of CN patients.

Variable		Multivariate analysis
		HR(95% CI)	P-value‡
Number	multiple Vs single	0.167 (0.052- 0.537)	0.003**
Surgery	Surg Vs None	0.284 (0.088- 0.921)	0.036*

Abbreviations: HR = hazard ratio; CI = confidence interval.

^‡Cox regression model test.