Retrieve and Analyze Clinical Trials in Public Registers

Provides functions for querying, retrieving and analyzing protocol- and results-related information on clinical trials from two public registers, the 'European Union Clinical Trials Register' ('EUCTR', <>), '' ('CTGOV', <>) and the 'ISRCTN' (<>). Trial information is downloaded, converted and stored in a database ('SQLite' or 'MongoDB', via 'nodbi'). Functions are provided to identify de-duplicated records, to easily find and extract variables (fields) of interest even from complex nesting as used by the registers, and to update previous queries that users retrieved in a database. The package can be used for meta analysis and trend-analysis of the design and conduct as well as results of clinical trials.


Reference manual

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1.7.1 by Ralf Herold, 2 months ago

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Authors: Ralf Herold [aut, cre]

Documentation:   PDF Manual  

MIT + file LICENSE license

Imports jsonlite, httr, curl, clipr, xml2, rvest, nodbi, stringi

Suggests devtools, knitr, rmarkdown, RSQLite, mongolite, tinytest, R.rsp

System requirements: sed, php, cat, perl

See at CRAN