Function reference • ctrdata

ctrdata-registers: ctrdata: information on clinical trial registers

ctrdata-package ctrdata: ctrdata: get started, database connection, function overview

Download information from clinical trial registers

ctrFindActiveSubstanceSynonyms(): Find synonyms of an active substance

ctrGetQueryUrl(): Get query details

ctrLoadQueryIntoDb(): Load and store register trial information

ctrOpenSearchPagesInBrowser(): Open reigster to show query results or search page

Using database with downloaded trial information

dbFindFields(): Find names of fields in the database collection

dbFindIdsUniqueTrials(): Get identifiers of deduplicated trial records

dbGetFieldsIntoDf(): Create data frame of specified fields from database collection

dbQueryHistory(): Show history of queries loaded into a database collection

Operate on data frame from dbGetFieldsIntoDf

dfMergeVariablesRelevel(): Merge variables, keeping type, and optionally relevel factors

dfName2Value(): Get value for variable of interest

dfTrials2Long(): Convert data frame with trial records into long format