derive_var_anrind: Derive Reference Range Indicator

In admiral: ADaM in R Asset Library

Derive Reference Range Indicator

Description

Derive Reference Range Indicator

Usage

derive_var_anrind(
  dataset,
  signif_dig = get_admiral_option("signif_digits"),
  use_a1hia1lo = FALSE
)

Arguments

dataset	Input dataset ANRLO, ANRHI, and AVAL are expected and if use_a1hia1lo is set to TRUE, A1LO and A1H1 are expected as well. Default value none
signif_dig	Number of significant digits to use when comparing values. Significant digits used to avoid floating point discrepancies when comparing numeric values. See blog: How admiral handles floating points Default value get_admiral_option("signif_digits")
use_a1hia1lo	A logical value indicating whether to use A1H1 and A1LO in the derivation of ANRIND. Default value FALSE

Details

In the case that A1H1 and A1LO are to be used, ANRIND is set to:

• "NORMAL" if AVAL is greater or equal ANRLO and less than or equal ANRHI; or if AVAL is greater than or equal ANRLO and ANRHI is missing; or if AVAL is less than or equal ANRHI and ANRLO is missing

• "LOW" if AVAL is less than ANRLO and either A1LO is missing or AVAL is greater than or equal A1LO

• "HIGH" if AVAL is greater than ANRHI and either A1HI is missing or AVAL is less than or equal A1HI

• "LOW LOW" if AVAL is less than A1LO

• "HIGH HIGH" if AVAL is greater than A1HI

In the case that A1H1 and A1LO are not to be used, ANRIND is set to:

• "NORMAL" if AVAL is greater or equal ANRLO and less than or equal ANRHI; or if AVAL is greater than or equal ANRLO and ANRHI is missing; or if AVAL is less than or equal ANRHI and ANRLO is missing

• "LOW" if AVAL is less than ANRLO

• "HIGH" if AVAL is greater than ANRHI

Value

The input dataset with additional column ANRIND

See Also

BDS-Findings Functions that returns variable appended to dataset: derive_basetype_records(), derive_var_analysis_ratio(), derive_var_atoxgr(), derive_var_atoxgr_dir(), derive_var_base(), derive_var_chg(), derive_var_ontrtfl(), derive_var_pchg(), derive_var_shift(), derive_vars_crit_flag()

Examples

library(tibble)
library(dplyr, warn.conflicts = FALSE)

vs <- tibble::tribble(
  ~USUBJID, ~PARAMCD, ~AVAL, ~ANRLO, ~ANRHI, ~A1LO, ~A1HI,
  "P01",       "PUL",    70,     60,    100,    40,   110,
  "P01",       "PUL",    57,     60,    100,    40,   110,
  "P01",       "PUL",    60,     60,    100,    40,   110,
  "P01",     "DIABP",   102,     60,     80,    40,    90,
  "P02",       "PUL",   109,     60,    100,    40,   110,
  "P02",       "PUL",   100,     60,    100,    40,   110,
  "P02",     "DIABP",    80,     60,     80,    40,    90,
  "P03",       "PUL",    39,     60,    100,    40,   110,
  "P03",       "PUL",    40,     60,    100,    40,   110
)

vs %>% derive_var_anrind(use_a1hia1lo = TRUE)
vs %>% derive_var_anrind(use_a1hia1lo = FALSE)

admiral documentation built on June 26, 2025, 1:08 a.m.