# OnCo record lead-time-bias (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/lead-time-bias/>
  a schema:DefinedTerm ;
  onco:kind "term" ;
  schema:identifier "lead-time-bias" ;
  schema:name "Lead time, and lead-time bias"@en ;
  schema:alternateName "lead time"@en, "lead-time"@en, "lead time bias"@en, "screening lead time"@en, "lead time in prostate cancer screening"@en ;
  schema:description "Finding a cancer earlier means you know about it for longer, even if nothing you do changes the day you die. That extra stretch of knowing is called the lead time, and lead-time bias is the mistake of counting it as extra life. It is the single biggest reason survival figures make screening look better than it is."@en ;
  schema:url <https://onco.cc/terms/lead-time-bias/> ;
  schema:dateModified "2026-09-25"^^xsd:date ;
  schema:sameAs <https://en.wikipedia.org/wiki/Lead_time_bias> ;
  schema:citation <https://doi.org/10.1093/jnci/djp001>, <https://doi.org/10.1093/jnci/djp278>, <https://doi.org/10.1001/jama.2018.3710>, <https://doi.org/10.1056/nejmoa0810084> ;
  onco:tag "gu", "prostate-glossary" ;
  onco:related <https://onco.cc/terms/overdiagnosis/>, <https://onco.cc/terms/number-needed-to-screen/>, <https://onco.cc/terms/overtreatment/>, <https://onco.cc/key-papers/paper-draisma-lead-time-overdiagnosis-psa-jnci-2009/>, <https://onco.cc/technologies/prostate-screening-psa-mri/> ;
  onco:cancers <https://onco.cc/cancers/prostate/>, <https://onco.cc/cancers/prostate-low-risk/>, <https://onco.cc/cancers/prostate-intermediate-risk/> ;
  onco:sections <https://onco.cc/fronts/early-detection/>, <https://onco.cc/fronts/prevention/> ;
  onco:terms <https://onco.cc/terms/overdiagnosis/>, <https://onco.cc/terms/overtreatment/>, <https://onco.cc/terms/number-needed-to-screen/>, <https://onco.cc/terms/screening/>, <https://onco.cc/terms/psa/> ;
  onco:bottlenecks <https://onco.cc/bottlenecks/b-overdiagnosis/>, <https://onco.cc/bottlenecks/b-early-detection/>, <https://onco.cc/bottlenecks/b-trial-design/> ;
  onco:keyPapers <https://onco.cc/key-papers/paper-draisma-lead-time-overdiagnosis-psa-jnci-2009/>, <https://onco.cc/key-papers/paper-welch-albertsen-psa-era-diagnosis-treatment-jnci-2009/>, <https://onco.cc/key-papers/paper-schroder-erspc-screening-mortality-nejm-2009/> .