Building-block: Proportion of subjects having at least one event

Building-block: Proportion of subjects having at least one event

Usage

p_subj_event_(dat, cell_index, intersect_index, subjectid_var)

Arguments

dat

data.table. The analysis data set.

cell_index

A vector of integers referencing the rows of dat (as specified by the INDEX_ column in dat) that match the population to be analyzed. See the "Endpoint Events" vignette in ramnog for more information.

intersect_index

A vector of intergers referencing the rows of dat that match both (1) the population to be analyzed and (2) the defenition of an event

subjectid_var

character. Name of the subject identifier variable in the data (default is "USUBJID").

Value

an integer value

Examples

dat <- data.table::data.table(USUBJID = c("S1", "S2", "S3"))
dat[, INDEX_ := .I]
#>    USUBJID INDEX_
#>     <char>  <int>
#> 1:      S1      1
#> 2:      S2      2
#> 3:      S3      3
data.table::setkey(dat, INDEX_)
p_subj_event_(dat, cell_index = 1:3, intersect_index = c(1L, 2L),
              subjectid_var = "USUBJID")
#> [1] 66.66667