FOUNDATIONAL TERM
Lead-time bias
提前量偏倚
Earlier diagnosis lengthens recorded survival without necessarily postponing death.
Study this concept in context
79 · Screening: benefits and limitations
Screening seeks problems before symptoms appear. It can create opportunities for useful intervention but can also cause false alarms, overdiagnosis, and downstream harm.
Sources
- WHO: Screening programmes—a short guide
- NCI: Cancer Screening Overview
- USPSTF: Grade Definitions
- NCI: Cancer Screening Overview—Health Professional Version
Definitions come from the published lessons. Read the linked lesson for mechanisms, conditions and examples.