derive_var_afeye: Derive Affected Eye

In admiralophtha: ADaM in R Asset Library - Ophthalmology

Derive Affected Eye

Description

Derive Affected Eye (AFEYE) in occurrence datasets

Usage

derive_var_afeye(dataset, loc_var, lat_var, loc_vals = "EYE")

Arguments

dataset	Input dataset. Permitted values a dataset, i.e., a data.frame or tibble Default value none
loc_var	Location variable, usually XXLOC. Permitted values an unquoted symbol, e.g., AVAL Default value none
lat_var	Laterality variable, usually XXLAT. Permitted values an unquoted symbol, e.g., AVAL Default value none
loc_vals	xxLOC values for which AFEYE is derived. Permitted values a character vector, e.g. c("EYE", "RETINA") Default value "EYE"

Details

Affected Eye is derived in the occurrence dataset using laterality and Study Eye. This assumes Study Eye has already been added from ADSL.

Value

The input occurrence dataset with Affected Eye (AFEYE) added.

Author(s)

Lucy Palmen

Examples

library(tibble)
library(admiral)

adae1 <- tribble(
  ~STUDYID, ~USUBJID, ~STUDYEYE, ~AELOC, ~AELAT,
  "XXX001", "P01", "RIGHT", "EYE", "RIGHT",
  "XXX001", "P01", "RIGHT", "EYE", "LEFT",
  "XXX001", "P01", "RIGHT", "EYE", "",
  "XXX001", "P01", "RIGHT", "", "RIGHT",
  "XXX001", "P02", "LEFT", "", "",
  "XXX001", "P02", "LEFT", "EYE", "LEFT",
  "XXX001", "P04", "BILATERAL", "EYE", "RIGHT",
  "XXX001", "P05", "RIGHT", "EYE", "RIGHT",
  "XXX001", "P05", "RIGHT", "EYE", "BILATERAL",
  "XXX001", "P06", "BILATERAL", "", "",
  "XXX001", "P06", "BILATERAL", "", "RIGHT",
  "XXX001", "P07", "BILATERAL", "EYE", "BILATERAL",
  "XXX001", "P08", "", "EYE", "BILATERAL",
  "XXX001", "P09", "NONSENSE", "EYE", "BILATERAL",
  "XXX001", "P09", "BILATERAL", "EYE", "NONSENSE",
  "XXX001", "P09", "BILATERAL", "NONSENSE", "BILATERAL",
  "XXX001", "P10", "RIGHT", "EYE", "BOTH"
)

derive_var_afeye(adae1, loc_var = AELOC, lat_var = AELAT)

adae2 <- tribble(
  ~STUDYID, ~USUBJID, ~STUDYEYE, ~AELOC, ~AELAT,
  "XXX001", "P01", "RIGHT", "EYES", "RIGHT",
  "XXX001", "P02", "RIGHT", "RETINA", "LEFT",
  "XXX001", "P03", "LEFT", "", ""
)

derive_var_afeye(adae2, loc_var = AELOC, lat_var = AELAT, loc_vals = c("EYES", "RETINA"))

admiralophtha documentation built on Jan. 18, 2026, 9:07 a.m.