bias Q - prepusmle4

[ArchivalUser]

prospective study about the effective of a new drug in CAD pts who were pilots and others who were automotive workers. the results suggested that the new drug was more effective in CAD pts who were pilots. which one invalidate the study?
A. admission rate bias
B. interviewer's bias
C. unacceptability bias
D. lead time bias

Plz give ans and why

[ArchivalUser]

is aspirin saft in pregnancy?

[ArchivalUser]

d
cos pilots have good health and will have false sense of prolonged survival

[ArchivalUser]

lead time is that chronic disease show a longer survive time because of the detect test.

[ArchivalUser]

it is D.
Nicely explained in UW