# OnCo record concordance-index (term). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)". Whole corpus: https://onco.cc/api/v1/onco.nt
@prefix schema: <https://schema.org/> .
@prefix onco: <https://onco.cc/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://onco.cc/terms/concordance-index/>
  a schema:DefinedTerm ;
  onco:kind "term" ;
  schema:identifier "concordance-index" ;
  schema:name "C-index (concordance index), Harrell's and Uno's"@en ;
  schema:alternateName "C-index"@en, "concordance index"@en, "Harrell's C-index"@en, "Harrell's C"@en, "Uno's C-index"@en, "Uno's C"@en, "C-statistic"@en, "pooled C-index"@en, "stratified C-index"@en, "within-type C-index"@en ;
  schema:description "The C-index is the fraction of patient pairs in which the model ranked the patient who had the event sooner as higher risk; 0.5 is a coin toss and 1.0 is perfect ranking."@en ;
  schema:url <https://onco.cc/terms/concordance-index/> ;
  schema:dateModified "2026-09-24"^^xsd:date ;
  schema:citation <https://doi.org/10.1001/jama.1982.03320430047030>, <https://doi.org/10.1002/sim.4154> ;
  onco:tag "cansim-terms" ;
  onco:related <https://onco.cc/terms/cancer-ai-vocabulary/> ;
  onco:terms <https://onco.cc/terms/censoring-and-events/>, <https://onco.cc/terms/calibration/>, <https://onco.cc/terms/time-dependent-auc/>, <https://onco.cc/terms/hazard-ratio/>, <https://onco.cc/terms/organ-of-origin-signal/> .