formulas Flashcards
Re/Ru =
RR
- can be CI/ incidence rate ration/ incidence density ration or prevalence ratio
= ππ/ππ
odds ratio
Interpret odds ratio
The odds of developing the (health outcome of interest) among the (exposed group) is XX.XX times the odds of
developing the (health outcome of interest) among the (unexposed exposed group) during (the period of time).
(π
π
β 1) Γ 100 πππ π
π
> ?
(1 β π
π
) Γ 100 πππ π
π
<?
1
% πΌππππππ π πΆβππππ
% π·ππππππ π πΆβππππ = 1
(ππ
β 1) Γ 100 πππ ππ
> ?
(1 β ππ
) Γ 100 πππ ππ
<?
% πΌππππππ π πΆβππππ = 1
% π·ππππππ π πΆβππππ 1
(π π β π π’)
RD = AR
- When there is an assumed/known causal relationship between the
exposure and the health outcome of interest,
[(π πβπ π’)/π π] Γ 100
APe=AR%
- used for RR or PR or OR
(π π‘ β π π’ )
PRD = PAR
[(π π‘βπ π’)/π π‘] Γ 100
APt = PAR%
[Pπ (π β 1)/ ππ (π β 1) + 1] Γ 100
π΄ππ‘ = ππ΄π %
for PR/RR/OR
b/b+d
Pe
