2.4. Nomogram construction of SWT against BRCA

In order to construct a nomogram of SWT against BRCA, the various genes of the prognostic model were combined with age, gender and TNM stages by univariate cox analysis and multivariate cox analysis. The different factors that exhibited significant differences in the univariate cox analysis were considered as risk factors associated with BRCA prognosis, while other factors that had significant differences in multivariate cox analysis were considered as independent prognostic risk factors for BRCA. We included the factors that showed significant differences in the multivariate cox analysis in the construction of the nomogram. In the nomogram, each factor was given a score. By adding the scores of all the different factors the total score was obtained and the patient's survival was predicted. Moreover, the c-index was used for the evaluation of the nomogram reliability, and the correction curves were used to assess the fit of the model.