Table 1.
Univariate analyses of variables in the model group by the Kaplan–Meier method.
Table 2.
Multivariate Cox regression analyses and the prognostic index (PI) formula based on the β-coefficients.
Fig 1.
PI-based Kaplan–Meier analysis in (a) model group, (b) internal validation, and (c) external validation.
Table 3.
PI-based Kaplan–Meier analysis and univariate Cox regression analysis in the model and validations.