Table 2 Multivariate Cox logistic regression analysis of PFS in TCGA and FUSCC cohort

Age

–

–

–

1.008

0.996–1.020

0.207

Gender (ref. male)

0.563

0.157–2.022

0.379

–

–

–

pT stage (ref. T1–T2)

0.467

0.093–2.340

0.354

1.782

1.084–2.930

0.023

pN stage (ref. N0)

–

–

–

1.937

1.250–3.001

0.003

pM stage (ref. M0)

2.690

1.034–7.000

0.043

1.763

1.104–2.813

0.018

AJCC stage (ref. I–II)

4.283

0.703–26.095

0.115

2.425

1.292–4.552

0.006

ISUP grade (ref. 1–2)

2.269

0.817–6.301

0.116

1.812

1.330–2.471

< 0.001

AQP9 expression (ref. negative)

3.443

1.058–11.205

0.040

1.714

1.258–2.335

0.001