Lead time bias is best described as a.an apparently lower survival rate among persons screened compared to an unscreened group b.a similar survival time for persons identified during a screening program relative to persons who are diagnosed by clinical symptoms c.an apparently longer survival time among persons identified during a screening program because they were identified at an earlier stage of their disease d.a truly longer survival time for persons identified during a screening program because they were given an effective treatment

Lead time bias happens when a screening test finds an illness sooner than a clinical diagnosis would…

Answered: Lead time bias is best described as…

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	a.	an apparently lower survival rate among persons screened compared to an unscreened group
	b.	a similar survival time for persons identified during a screening program relative to persons who are diagnosed by clinical symptoms
	c.	an apparently longer survival time among persons identified during a screening program because they were identified at an earlier stage of their disease
	d.	a truly longer survival time for persons identified during a screening program because they were given an effective treatment