Distribution pattern and prognosis of metastatic lymph nodes in cervical posterior to level V in nasopharyngeal carcinoma patients

Table 5 Multivariate analysis of DMFS in 591 NPC patients

Variable	B	SE	P	HR	95%CI
Involvement of lower neck levels (yes vs. no)
level IVa	0.241	0.358	0.501	1.273	0.631–2.568
level IVb	0.909	0.564	0.107	2.481	0.821–7.500
level Vb	0.660	0.460	0.151	1.934	0.786–4.763
level Vc	0.102	0.650	0.875	1.107	0.310–3.956
PLV	0.925	0.460	0.044	2.522	1.023–6.214
N stage (N0 + 1 vs. N2 + 3)	−0.296	0.360	0.410	0.744	0.367–1.506
TNM stage (I + II vs. III + IVa)	−0.390	0.475	0.411	0.677	0.267–1.716

ISSN: 1471-2407