f.controlType: Calculate type of control data collected in a study

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

Calculate type of control data collected in a study

Description

Trial concept calculated: type of internal control. ICH E10 lists as types of control: placebo concurrent control, no-treatment concurrent control, dose-response concurrent control, active (positive) concurrent control, external (including historical) control, multiple control groups. Dose-controlled trials are currently not identified. External (including historical) controls are so far not identified in specific register fields. Cross-over designs, where identifiable, have active controls.

Usage

f.controlType(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 '.controlType', which is a factor with levels 'none', 'no-treatment', 'placebo', 'active', 'placebo+active' and 'other'.

Examples

# fields needed
f.controlType()

# 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.controlType",
  con = dbc)
trialsDf

ctrdata documentation built on April 15, 2025, 1:34 a.m.