f.assignmentType: Calculate type of assignment to intervention in a study

In ctrdata: Retrieve and Analyze Clinical Trials Data from Public Registers

Calculate type of assignment to intervention in a study

Description

Calculate type of assignment to intervention in a study

Usage

f.assignmentType(df = NULL)

Arguments

df	data frame such as from dbGetFieldsIntoDf. If 'NULL', prints fields needed in 'df' for calculating this trial concept, which can be used with dbGetFieldsIntoDf.

Value

data frame with columns '_id' and '.assignmentType', which is a factor with levels 'R' (randomised assignment) and 'NR' (all other types of assignment).

Examples

# fields needed
f.assignmentType()

# apply trial concept when creating data frame
dbc <- nodbi::src_sqlite(
  dbname = system.file("extdata", "demo.sqlite", package = "ctrdata"),
  collection = "my_trials", flags = RSQLite::SQLITE_RO)
trialsDf <- dbGetFieldsIntoDf(
  field = "ctrname",
  calculate = "f.assignmentType",
  con = dbc)
trialsDf

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