3D-image-guided HDR-brachytherapy versus 2D HDR - brachytherapy after external beam radiotherapy for early T-stage nasopharyngeal carcinoma

Table 2 Summary of multivariate analysis of prognostic factors

	Factors	B	p-value	Exp (B)	Exp (B) (95% CI)
LCS	T category	2.298	0.005	9.959	1.977 - 50.169
	N category	1.460	0.042	0.232	0.057 - 0.949
	3D-BT vs. 2D-BT	NS
DFS	T category	0.973	0.031	2.647	1.093 - 6.407
	N category	2.950	< 0.001	19.113	5.621 - 64.997
	3D-BT vs. 2D-BT	NS
OS	T category	NS
	N category	2.625	< 0.001	13.800	4.128 - 46.127
	3D-BT vs. 2D-BT	NS
LRFS	T category	1.407	0.025	4.083	1.192 - 13.989
	N category	NS
	3D-BT vs. 2D-BT	NS
CSS	T category	NS
	N category	3.106	< 0.001	22.324	6.073 - 82.067
	3D-BT vs. 2D-BT	NS
DMFS	T category	NS
	N category	4.043	< 0.001	57.020	9.307 - 349.347
	3D-BT vs. 2D-BT	NS

Abbreviations: CI, confidence interval; 2D-BT, two-dimensional high-dose-rate brachytherapy; 3D-BT, three-dimensional high-dose-rate brachytherapy; NS, not significant.

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