Table 4.
Concordance statistics measuring overall discrimination for seventh and eighth editions for both HPV-selected cohort and the entire cohort of OPSCC patients.
| STAGE | C-index (95% CI) | SE | P-value |
|---|---|---|---|
| Eighth edition: HPV-associated cohort | 0.6846(0.6704, 0.6987) | 0.0072 | <.001 |
| Seventh edition: HPV-associated cohort | 0.6260(0.6098, 0.6422) | 0.0083 | <.001 |
| Eighth edition: Entire cohort | 0.6457(0.6372, 0.6542) | 0.0043 | <.001 |
| Seventh edition: Entire cohort | 0.5860(0.5767, 0.5953) | 0.0048 | <.001 |
| Note: | |||
| C-index METHOD | EXPLANATION | ||
| R (Approach3) | based on“concordance.index”function(Rpackage:survcomp) | ||
P-value of 0 is represented as <.001.
Abbreviations: CI, confidence interval; HPV, human papilloma virus.