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Overdiagnosis, lead time, and why survival rates mislead
Overdiagnosis, lead time, and why survival rates mislead: pages on overdiagnosis versus overtreatment, lead-time bias, length-time bias, and the five-year…
This launch guide maps the topic, the source base and the practical questions. Check the linked official authority before acting on a rule, deadline, price or safety requirement.
What this guide covers
Pages on overdiagnosis versus overtreatment, lead-time bias, length-time bias, and the five-year survival trap — with the worked example where survival climbs handsomely while the number of deaths does not move at all — plus incidentalomas, the "we looked harder and found more" pattern, the South Korean thyroid cancer episode, the PSA history, and a final page on reading the numbers in a screening invitation letter.
Twelve pages, and the concept has essentially no plain-language treatment in any of the three local languages.
How to use it
Use Overdiagnosis, lead time, and why survival rates mislead as a structured learning path: begin with the vocabulary, follow the evidence map, and keep the uncertainty labels attached to claims as you compare sources.
The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.
Search vocabulary in four languages
Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.
| Language | Example phrase |
|---|---|
| Estonian | ülediagnoosimine tähendus |
| Finnish | ylidiagnostiikka tarkoittaa |
| Russian | гипердиагностика при скрининге |
| English | five year survival rate misleading |
Evidence and provenance
The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.
Source: own writing; NCI definitions (US public domain), Welch & Black 2010 and the Cochrane mammography review cited; Korean incidence and mortality series from the published national registry data. · checked 2026-09-09
Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.
Scope and boundaries
YMYL. Never argues for or against attending a programme; every page links to the national screening invitation and to a clinician.
Connected TempoLife guides
The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.
Screening
Continue to the related TempoLife reference.
Risk
Continue to the related TempoLife reference.
Why it belongs on TempoLife
/screening, /risk.
Frequently asked questions
What does this guide cover?
Pages on overdiagnosis versus overtreatment, lead-time bias, length-time bias, and the five-year survival trap — with the worked example where survival climbs handsomely while the number of deaths does not move at all — plus incidentalomas, the "we looked harder and found more" pattern, the South Korean thyroid cancer episode, the PSA history, and a final page on reading the numbers in a screening invitation letter. Twelve pages, and the concept has essentially no plain-language treatment in any of the three…
What evidence does it use?
own writing; NCI definitions (US public domain), Welch & Black 2010 and the Cochrane mammography review cited; Korean incidence and mortality series from the published national registry data.
Where does this guide stop?
YMYL. Never argues for or against attending a programme; every page links to the national screening invitation and to a clinician.
Turn the reference into a routine
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