Table 3.

Multivariable analysis for patients after LRRT

Characteristic	Hazard ratio	95%CI	P value
No. of metastatic organs
1	Reference
> 1	2.177	1.445–3.281	< 0.001
No. of metastatic lesions
≤ 5	Reference
> 5	2.772	1.860–4.132	< 0.001
EBV-DNA (Copies/ml)
≤ 25,000	Reference
> 25,000	1.355	0.956–1.355	0.035
LRRT technique
2DCRT	Reference
IMRT	0.935	0.667–1.312	0.699