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+--- Thread: Biostats - nurden (/showthread.php?tid=846641)
0 - ArchivalUser - 05-26-2018
in a case control-study if prevalence is low OR can be used to estimate RR. For ex if OR=2, there is "two-fold risk" of developing a disease from the exposure. the problem with this is that OR overestimates RR.
OR is a/ b divided by c/ d while
RR is a/ a+b divided by c/ c+d
so OR=0.6
the risk of colon cancer in the aspirin users is 0.6, when compared to the nonusers. It is < 1, indicating a protective effect of aspirin. So aspirin reduced the risk of colon cancer by 40%=1-0.6=0.4
0 - ArchivalUser - 05-29-2018
thank you
0 - ArchivalUser - 06-01-2018
Good Q.
0 - ArchivalUser - 06-04-2018
good explanation
0 - ArchivalUser - 06-06-2018
thanx
0 - ArchivalUser - 06-07-2018
any tutor for biostats?
0 - ArchivalUser - 06-19-2018
there are
0 - ArchivalUser - 06-24-2018
I am worried about biostats, it has not been my favorite subject, is there anyone who can explain it to me?
0 - ArchivalUser - 06-26-2018
You should not. biostat is very important for step 3.
0 - ArchivalUser - 07-14-2018
I need a sp