{"entity":{"id":"os-pfs-time-event","kind":"term","name":"Survival outcomes as time plus event (OS, PFS)","aka":["time-to-event outcome","time and event","survival time and status","OS time","PFS time","event indicator","vital status","days to death","days to last follow-up"],"tldr":"A survival outcome is recorded as two numbers per patient: how long they were followed, and whether the event (death, or progression) happened by then.","summary":"Survival analysis is the branch of statistics for the expected time until an event such as death occurs (Wikipedia). In datasets such as TCGA the outcome is stored as a time (days to death or to last follow-up) and an event flag (vital status), from which overall survival is computed; progression-free survival needs progression dates, which TCGA records unevenly. Follow-up in TCGA is short for many cancers, so event counts are low and survival models trained on it are noisy.","asOf":"2026-09-24","wikipedia":"https://en.wikipedia.org/wiki/Survival_analysis","links":[{"label":"Wikipedia","url":"https://en.wikipedia.org/wiki/Survival_analysis"}],"tags":["cansim-terms"],"related":["cancer-ai-vocabulary"],"cancers":[],"sections":[],"technologies":[],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":["os","pfs","censoring-and-events","kaplan-meier-curve"],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":["Listed in the CanSim terms map 1.0.0 (docs/onco/terms.json, generated 2026-09-24), CC BY 4.0, attribution: CanSim project, an open, public-data-first cancer foundation-model programme; CanSim page path /terms/os-pfs-outcomes."],"provenance":{"editedBy":"OnCo CanSim terms wave (Wikipedia summaries, standards and project pages, GDC and FDA pages, Europe PMC)","editedOn":"2026-09-24","note":"CanSim terms map 1.0.0 (docs/onco/terms.json, generated 2026-09-24), CC BY 4.0, attribution: CanSim project, an open, public-data-first cancer foundation-model programme"},"category":"Endpoints"},"route":"/terms/os-pfs-time-event/","neighbours":{"term":[{"id":"cancer-ai-vocabulary","kind":"term","name":"Cancer AI vocabulary (CanSim terms map)","route":"/terms/cancer-ai-vocabulary/"},{"id":"censoring-and-events","kind":"term","name":"Censoring and events in survival data","route":"/terms/censoring-and-events/"},{"id":"kaplan-meier-curve","kind":"term","name":"Kaplan-Meier curve, censoring and proportional hazards","route":"/terms/kaplan-meier-curve/"},{"id":"os","kind":"term","name":"Overall survival (OS)","route":"/terms/os/"},{"id":"pfs","kind":"term","name":"Progression-free survival (PFS)","route":"/terms/pfs/"}]}}