(string) the treatment variable name. The treatment variable
must be a factor with 2 levels where the first level is the control and the
second one the treatment.
subgr
(character) vector with the name of the subgrouping
variables. These variables have to be factor variables with the subgroups
as levels.
data
(data frame) the data frame with the variables.
resptype
(string) the type of data used. Can be "survival"
or "binary".
status
(string) only for "survival" resptype,
the status variable name in survival data.