What are Lead-Time Bias and Length-Time Bias?

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Lead-time and length-time bias, and examples to help clarify the concepts.

Lead-time bias:

The earlier we diagnose a disease, the longer patients will appear to survive, when in fact we just started counting earlier.

Length-time bias:

Patients with slowly progressing diseases are more likely to be detected through screening

• Format Videos
• Language/s English
• Target Audience Further education, Self-directed learning
• Duration <5 mins

Key Concepts addressed

• 1-2j Earlier is not necessarily better

Details

Abi Kirubarajan defines lead-time and length-time bias, and provides examples to help clarify the concepts.