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Type one or more levels in the text field. You
must
enclose each level in
double quotation marks
(
“”
) and separate multiple levels with
spaces
(
).
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To fit a time-only model, specify one level as
"T
x
"
, where
x
is the number of the time period. For example, type
"T2"
in the text field to make the second time period the control level. By default the first time period,
"T1"
, is used as the control level.
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To fit a treatment-only model, specify one level in
double quotation marks
. The default level is
"Placebo"
or
"Pbo"
if it is found (case insensitive). Otherwise, it is the last sorted level.
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To fit a treatment-time interaction model, specify two different levels in
double quotation marks
separated by a
space
. For example, specify
"DRUG2" "T2"
to make
DRUG2
and the second time period the control levels.
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