Table 11 C-index analysis of the prognostic accuracy of HECW1 and other variables for overall survival and progression-free survival in the training cohort (n = 150) and validation cohort (n = 150) (1:1 ratio)

TNM stage

0.669(0.588–0.750)

0.686(0.588–0.784)

0.659(0.566–0.752)

0.664(0.572–0.756)

SSIGN

0.684(0.598–0.770)

0.605(0.513–0.697)

0.734(0.637–0.831)

0.607(0.521–0.692)

HECW1

0.791(0.749–0.833)

0.817(0.776–0.858)

0.781(0.731–0.831)

0.830(0.789–0.871)

HECW1 + TNM

0.834(0.788–0.880)

0.847(0.799–0.895)

0.829(0.775–0.883)

0.845(0.797–0.893)

HECW1 + SSIGN

0.854(0.803–0.905)

0.844(0.794–0.894)

0.854(0.793–0.915)

0.861(0.816–0.906)