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. 2022 May 27;36(7):e24517. doi: 10.1002/jcla.24517

TABLE 3.

Comparison of the prognostic accuracies of combinational models for overall and recurrence‐free survival in the neoadjuvant group

Model Neoadjuvant group ‐ Fudan cohort (n = 98) Neoadjuvant group ‐ validation cohort (n = 81)
C‐index AIC C‐index AIC
OS
Tumor‐CD9 0.604 525.52 0.588 518.49
Stroma‐CD9 0.579 528.24 0.592 517.30
Tumor&Stroma‐CD9 risk level 0.643 518.86 0.642 506.00
TNM stage 0.624 518.79 0.604 510.02
Tumor&Stroma‐CD9 risk level + TNM stage 0.676 512.51 0.666 502.91
RFS
Tumor‐CD9 0.593 533.42 0.583 484.63
Stroma‐CD9 0.590 533.64 0.588 485.21
Tumor&Stroma‐CD9 risk level 0.643 524.59 0.637 472.79
TNM stage 0.628 527.28 0.606 477.45
Tumor&Stroma‐CD9 risk level + TNM stage 0.680 519.53 0.665 470.73

Abbreviations: AIC, Akaike information criterion; C‐index, concordance index; OS, overall survival; RFS, recurrence‐free survival.