Independent prognostic factors in the training cohort
The univariate Cox-Regression analysis showed a significant association
between CSS and age at diagnosis, race, sex, tumor size, histologic
grade, historic stage, chemotherapy and radiotherapy. Therefore, these
variables formed the input for the multivariate Cox-Regression analysis,
which revealed that age, race, tumor size, grade and radiotherapy
(P<0.05) were independent prognostic factors (Table 2).
Table 2. Univariate and
multivariate analysis for the training cohort.