Involvement of both Cervical Lymph Nodes and Retropharyngeal Lymph Nodes has prognostic value for N1 patients with Nasopharyngeal Carcinoma

Table 5 Summary of multivariate analysis of factors in patients with N1 disease

Endpoint	Factor	B	P value	Exp (B)	95% CI for Exp (B)
DMFS	Both CLNs and RLNs involvement	-1.498	0.019	0.224	0.064-0.783
	T stage	-1.374	0.005	0.253	0.096-0.666
	Technique of radiotherapy	0.978	0.035	2.660	1.072-6.603
	Sex	1.310	0.081	3.705	0.853-16.093
PFS	Both CLNs and RLNs involvement	-1.179	0.019	0.307	0.115-0.825
	T stage	-1.046	0.010	0.351	0.159-0.776
	Technique of radiotherapy	0.773	0.054	2.167	0.988-4.751
LRFS	Both CLNs and RLNs involvement	-1.002	0.051	0.367	0.134-1.003
	T stage	-0.671	0.129	0.511	0.215-1.215

Bold numbers, indicated there was statistically significant difference (p value < 0.05).
RLN indicates retropharyngeal lymph node.
CLN indicates cervical lymph node.
LRFS, DMFS, PFS indicate for local-regional recurrence-free survival, distant metastasis-free survival and progression-free survival.

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