derive_var_chg: Derive Change from Baseline
In epijim/admiral: ADaM in R Asset Library

Description Usage Arguments Details Value Author(s) See Also Examples

Derive change from baseline (CHG) in a BDS dataset

1	derive_var_chg(dataset)

dataset

The input dataset. Required variables are AVAL and BASE.

Change from baseline is calculated by subtracting the baseline value from the analysis value.

The input dataset with an additional column named CHG

Thomas Neitmann

derive_var_pchg()

advs <- tibble::tribble(
  ~USUBJID, ~PARAMCD, ~AVAL, ~ABLFL, ~BASE,
  "P01",    "WEIGHT", 80,    "Y",    80,
  "P01",    "WEIGHT", 80.8,  "",     80,
  "P01",    "WEIGHT", 81.4,  "",     80,
  "P02",    "WEIGHT", 75.3,  "Y",    75.3,
  "P02",    "WEIGHT", 76,    "",     75.3
)
derive_var_chg(advs)