RISK, ODDS and RATIOS Flashcards
1
Q
Relative risk
A
Relative risk (RR) is the ratio of risk in the experimental group (experimental event rate, EER) to risk in the control group (control event rate, CER). The term relative risk ratio is sometimes used instead of relative risk.
2
Q
EER
A
rate at which events occur in the experimental group
3
Q
CER
A
rate at which events occur in the control group
4
Q
Relative risk ratio
A
EER / CER
5
Q
Relative risk reduction
A
Relative risk reduction (RRR) or relative risk increase (RRI) is calculated by dividing the absolute risk change by the control event rate
I.E EER-CER / CER
6
Q
Absolute risk reduction
A
ARR = CER - EER
7
Q
NNT
A
1/ARR
8
Q
Odds ratio
A
Radio of those who incur the outcome to those who do not incur the outcome
