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. 2020 Nov 15;19:1533033820971605. doi: 10.1177/1533033820971605

Table 4.

The C-index of Nomogram Model and TNM Stage for Prediction of OS in the Primary Cohort and Validation Cohort.

Variables Primary cohort Validation cohort
C-index(95%CI) P C-index(95%CI) P
Nomogram Model 0.711(0.675-0.747) 0.703(0.671-0.735)
TNM stage 0.531(0.488-0.574) 0.582(0.545-0.619)
Nomogram Model vs TNM stage < 0.01 < 0.01

* Nomogram Model: including 4 risk factors (age, stage, CAR, NEU). C-index = concordance index; CI = confidence interval. P < 0.05 was considered statistically significant.