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ctrdata

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Retrieve and Analyze Clinical Trials Data from Public Registers

View on CRAN: Click here

Download and install ctrdata package within the R console
Install from CRAN:

 install.packages("ctrdata")

Install from Github:

 library("remotes")

                        install_github("cran/ctrdata")

Install by package version:

 library("remotes")

                        install_version("ctrdata", "1.26.0")

Attach the package and use:

 library("ctrdata")

Maintained by
Ralf Herold
[Scholar Profile | Author Map]

All associated links for this package

First Published: 2019-03-12

Latest Update: 2025-07-25

Description:

A system for querying, retrieving and analyzing protocol- and results-related information on clinical trials from four public registers, the 'European Union Clinical Trials Register' ('EUCTR', ), 'ClinicalTrials.gov' ('CTGOV', using the classic interface at , and 'CTGOV2', using the current interface at ), the 'ISRCTN' () and the 'European Union Clinical Trials Information System' ('CTIS', ). Trial information is downloaded, converted and stored in a database ('PostgreSQL', 'SQLite', 'DuckDB' or 'MongoDB'; via package 'nodbi'). Documents in registers associated with trials can also be downloaded. Other functions identify deduplicated records, easily find and extract variables (fields) of interest even from complex nested data as used by the registers, merge variables and update queries. The package can be used for meta-analysis and trend-analysis of the design and conduct as well as of the results of clinical trials.

How to cite:

Ralf Herold (2019). ctrdata: Retrieve and Analyze Clinical Trials Data from Public Registers. R package version 1.26.0, https://cran.r-project.org/web/packages/ctrdata. Accessed 25 Jun. 2026.

Previous versions and publish date:

0.14.1 (2019-03-12 17:26), 0.17.0 (2019-03-27 22:50), 0.18.2 (2019-05-01 19:30), 0.18 (2019-04-11 23:57), 1.0.1 (2019-10-23 09:50), 1.0 (2019-10-16 23:50), 1.1 (2019-11-13 01:20), 1.2.1 (2020-05-18 18:40), 1.2 (2019-12-08 08:30), 1.3.0 (2020-07-27 11:50), 1.3.1 (2020-08-02 03:10), 1.3.2 (2020-10-05 09:20), 1.4.0 (2020-10-19 19:40), 1.4.1 (2020-11-03 22:30), 1.5.0 (2021-03-16 13:20), 1.5.1 (2021-03-21 16:50), 1.5.2 (2021-04-06 09:10), 1.5.3 (2021-04-20 00:10), 1.6.0 (2021-05-10 02:02), 1.7.0 (2021-07-25 15:30), 1.7.1 (2021-08-22 23:30), 1.8.0 (2021-11-22 00:00), 1.9.0 (2022-03-13 23:40), 1.9.1 (2022-04-24 16:30), 1.10.0 (2022-07-06 12:20), 1.10.1 (2022-07-24 23:50), 1.10.2 (2022-08-20 23:50), 1.11.0 (2022-11-02 23:20), 1.11.1 (2022-11-20 23:00), 1.12.0 (2023-03-26 10:30), 1.12.1 (2023-03-29 09:00), 1.13.0 (2023-04-24 14:20), 1.13.1 (2023-05-07 21:20), 1.13.2 (2023-05-26 11:30), 1.13.3 (2023-06-24 12:50), 1.14.0 (2023-07-16 23:40), 1.15.0 (2023-08-28 01:10), 1.15.1 (2023-08-30 11:10), 1.15.2 (2023-09-18 00:50), 1.16.0 (2023-11-24 16:40), 1.17.0 (2024-01-22 21:53), 1.17.1 (2024-02-05 00:30), 1.17.2 (2024-02-25 13:10), 1.18.0 (2024-05-13 22:53), 1.19.0 (2024-06-30 14:50), 1.19.1 (2024-07-18 21:00), 1.19.2 (2024-08-29 02:00), 1.19.3 (2024-09-22 18:10), 1.19.4 (2024-09-29 20:10), 1.19.5 (2024-11-10 18:10), 1.20.0 (2024-12-14 11:00), 1.21.0 (2025-03-09 22:50), 1.21.1 (2025-03-15 23:10), 1.22.0 (2025-04-14 19:50), 1.22.1 (2025-05-05 08:00), 1.22.2 (2025-05-17 16:20), 1.22.3 (2025-06-08 09:10), 1.23.0 (2025-07-02 22:40), 1.24.0 (2025-07-21 09:40), 1.24.1 (2025-07-25 12:10), 1.25.0 (2025-08-26 10:30), 1.25.1 (2025-12-08 02:00), 1.26.0 (2026-01-18 09:30)

Other packages that cited ctrdata R package

View ctrdata citation profile

Other R packages that ctrdata depends, imports, suggests or enhances

View ctrdata dependency map

Complete documentation for ctrdata

View documentation PDF

Functions, R codes and Examples using the ctrdata R package

Some associated functions: ctrDb . ctrFindActiveSubstanceSynonyms . ctrGetQueryUrl . ctrLoadQueryIntoDb . ctrOpenSearchPagesInBrowser . ctrdata-registers . ctrdata . dbFindFields . dbFindIdsUniqueTrials . dbGetFieldsIntoDf . dbQueryHistory . dfMergeVariablesRelevel . dfName2Value . dfTrials2Long .
Some associated R codes: ctrFindActiveSubstanceSynonyms.R . ctrGetQueryUrl.R . ctrLoadQueryIntoDb.R . ctrLoadQueryIntoDbCtgov.R . ctrLoadQueryIntoDbCtgov2.R . ctrLoadQueryIntoDbCtis.R . ctrLoadQueryIntoDbEuctr.R . ctrLoadQueryIntoDbIsrctn.R . ctrOpenSearchPagesInBrowser.R . ctrRerunQuery.R . ctrdata-package.R . ctrdata-registers.R . dbFindFields.R . dbFindIdsUniqueTrials.R . dbGetFieldsIntoDf.R . dbQueryHistory.R . dfMergeVariablesRelevel.R . dfName2Value.R . dfTrials2Long.R . utils.R . zzz.R . Full ctrdata package functions and examples

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