Formula and Definiton Flashcards
1
Q
Risk
A
Proportion of pop with outcome/ entire population
2
Q
Odds
A
Ratio of those with outcome/without outcome
3
Q
Below 10%
A
Odds and risk become same
4
Q
Odds ratio (relative odds)
A
Odd 1/Odd 2
5
Q
OR 1
OR >1
OR <1
A
No effect
Outcome inc with exposure
Outcome dec with exposure
6
Q
Baseline Risk
A
Risk before intervention
7
Q
Relative risk
A
risk after intervention
8
Q
ARD
A
Difference between baseline and relative
control-experimental
9
Q
ARR
ARI
A
Reduction, dec risk
Increase, inc risk
10
Q
RRD
A
Change from baseline to relative
(control-experimental)/control
11
Q
RRR
RRI
A
Reduction, dec risk
Increase, inc risk
12
Q
NNT/NNH
A
Express ARD
100/ARD%
13
Q
ARR
ARI
Related to NNT/NNH
A
of exp pts leading to 1 + harm
of exp pts preventing 1 + harm
