Table 4 Multivariate analyses for prognostic factors in both groups

GTV (<5 cm ³ vs. ≥5 cm ³ )

1.452

0.343

6.673

0.003

Postoperative T stage (I + II stage vs. advanced stage)

0.685

0.275

1.843

0.005

Regional recurrence of lymph node metastases (=1 vs. >1)

0.021

0.004

1.016

0.002

Chemotherapy (Yes vs. No)

1.035

0.395

6.879

0.009