Table 7.

Multivariate analysis of prognostic factors

Factors	3-year OS	3-year LRFS	3-year DMFS	3-year PFS
Age (years)
<55 vs ≥55	0.572	0.483	0.396	0.424
Gender
Female vs male	0.426	0.537	0.389	0.692
T stage
T1-2 vs T3-4	0.224	0.186	0.042*	0.221
N stage
N0-1 vs N2-3	0.337	0.281	0.021*	0.342
Use of CCRT
No vs yes	0.398	0.592	0.424	0.482
GTVnx volume (cm3)
<40 vs ≥40	0.192	0.342	0.112	0.173

Note:

^*P<0.05.

Abbreviations: CCRT, concurrent chemoradiotherapy; DMFS, distant metastasis-free survival; LRFS, local relapse-free survival; OS, overall survival; PFS, progression-free survival.