Treatment
This form calculates the
absolute measures of efficacy
, numberneededtotreat (
NNT
) and absolute risk reduction (
ARR
), from relative measures such as odds ratio (
OR
) or relative risk ratio (
RR
)
1. Enter:
The event rate in the control group
%
One of:
Odds ratio
:
Relative risk ratio
:
Relative risk reduction
:
%
2. Is the clinical outcome
bad
or
good
?
3.

warning!