Specify a control (reference) level of the treatment
arm
. The level that you specify is used as the reference against other levels of the
Treatment Variable
in the
Cochran-Mantel-Haenszel exact test
to screen events or interventions for difference in incidence.
Note
: If you leave this field
blank
, the default level is
“Placebo”
or
“Pbo”
(both case insensitive) if found. Otherwise, it is the first sorted level.
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