Table 3.

The 3-year disease-free survival and locoregional control according to surgical margins

Surgical margin	Disease-free survival (%)	p	Locoregional control (%)	p
1 mm
≤1 mm	56	0.02*	59	<0.01*
>1 mm	77		81
HR, univariate	0.4 (95% CI, 0.19-0.86)	0.02	0.4 (95% CI, 0.16-0.80)	0.01
HR, multivariate	0.2 (95% CI, 0.06-0.72)	0.02	0.2 (95% CI, 0.05-0.67)	0.01
2 mm
≤2 mm	59	<0.01*	64	<0.01*
>2 mm	93		97
HR, univariate	0.1 (95% CI, 0.03-0.62)	<0.01	0.1 (95% CI, 0.01-0.64)	0.02
HR, multivariate	0.1 (95% CI, 0.01-0.60)	0.01	0.1 (95% CI, 0.01-0.72)	0.02
3 mm
≤3 mm	67	0.06*	71	0.04*
>3 mm	91		95
HR, univariate	0.3 (95% CI, 0.06-1.16)	0.08	0.2 (95% CI, 0.02-1.19)	0.07
HR, multivariate	0.2 (95% CI, 0.03-1.86)	0.17	0.3 (95% CI, 0.03-2.12)	0.21
4 mm
≤4 mm	69	0.13*	73	0.09*
>4 mm	89		94
HR, univariate	0.3 (95% CI, 0.08-1.49)	0.15	0.2 (95% CI, 0.03-1.53)	0.12
HR, multivariate	0.3 (95% CI, 0.04-2.16)	0.22	0.3 (95% CI, 0.04-2.52)	0.28
5 mm
≤5 mm	72	0.36*	75	0.22*
>5 mm	86		92
HR, univariate	0.5 (95% CI, 0.12-2.22)	0.37	0.3 (95% CI, 0.04-2.30)	0.25
HR, multivariate	0.5 (95% CI, 0.07-4.22)	0.56	0.6 (95% CI, 0.08-4.80)	0.63

Abbreviation: HR, hazard ratio; 95% CI, 95% confidence interval.

*, p values were calculated by using Kaplan-Meier method; other non-specified p values were calculated by using Cox proportional hazard regression.