metadata
license: cc0-1.0
task_categories:
- tabular-classification
- tabular-regression
tags:
- clinical-trials
- clinicaltrials-gov
- aact
- duckdb
- medical
- health
- government-data
pretty_name: ClinicalTrials.gov Database
size_categories:
- 10M<n<100M
ClinicalTrials.gov Database (AACT)
A clean, queryable DuckDB database built from the AACT flat files -- the most comprehensive structured export of ClinicalTrials.gov data.
56,397,018 rows across 48 tables covering every registered clinical trial.
Built with clinicaltrials-database.
Quick Start
DuckDB CLI
INSTALL httpfs;
LOAD httpfs;
ATTACH 'https://huggingface.co/datasets/Nason/clinicaltrials-database/resolve/main/clinicaltrials.duckdb' AS ct (READ_ONLY);
-- Trials by phase
SELECT overall_status, COUNT(*) as n
FROM ct.studies
GROUP BY overall_status
ORDER BY n DESC;
Python
import duckdb
con = duckdb.connect()
con.sql("INSTALL httpfs; LOAD httpfs;")
con.sql("""
ATTACH 'https://huggingface.co/datasets/Nason/clinicaltrials-database/resolve/main/clinicaltrials.duckdb'
AS ct (READ_ONLY)
""")
con.sql("SELECT * FROM ct.studies LIMIT 5").show()
DuckDB uses HTTP range requests, so only the pages needed for your query are downloaded.
Tables
| Table | Description | Rows |
|---|---|---|
reported_events |
Summary of reported adverse events | 11,446,277 |
outcome_measurements |
Summary data for outcome measures by study group | 4,777,352 |
browse_conditions |
NLM-generated MeSH terms for study conditions | 4,194,046 |
design_outcomes |
Planned outcome measures and observations | 3,566,612 |
facilities |
Facility names, addresses, and recruiting status | 3,410,973 |
baseline_measurements |
Demographic and baseline measures by group | 2,808,533 |
browse_interventions |
NLM-generated MeSH terms for study interventions | 2,480,003 |
result_groups |
Aggregate list of group titles/descriptions for results reporting | 2,120,694 |
outcome_counts |
Sample sizes for each outcome by study group | 1,537,817 |
keywords |
Investigator-provided keywords describing the study | 1,523,516 |
design_group_interventions |
Cross-reference mapping design groups to interventions | 1,283,125 |
study_references |
Citations to publications related to the study | 1,078,399 |
design_groups |
Protocol-specified groups or cohorts assigned to interventions | 1,056,031 |
conditions |
Disease or condition names studied in each trial | 1,025,650 |
interventions |
Interventions or exposures: drugs, devices, procedures, vaccines | 973,952 |
sponsors |
Sponsor and collaborator names and types | 920,618 |
milestones |
Participant progress through each stage of the study | 855,865 |
countries |
Countries where the study has sites | 783,722 |
id_information |
Identifiers other than NCT ID (org study IDs, secondary IDs) | 748,312 |
outcomes |
Outcome measure descriptions and time frames | 638,016 |
outcome_analysis_groups |
Groups involved in each outcome analysis | 609,509 |
drop_withdrawals |
Summary of participant withdrawals: counts and reasons | 577,923 |
reported_event_totals |
Totals of reported adverse events by category | 577,536 |
calculated_values |
AACT-computed fields: months to report results, facilities count, etc. | 576,029 |
studies |
Core study record: title, status, phase, type, dates, enrollment, and regulatory info | 576,029 |
brief_summaries |
Brief text summary of the study protocol | 575,064 |
detailed_descriptions |
Detailed text description of the study protocol | 575,064 |
eligibilities |
Participant eligibility criteria (inclusion/exclusion, age, sex) | 575,064 |
designs |
Study design details: allocation, masking, assignment, purpose | 571,286 |
responsible_parties |
Parties responsible for submitting study information | 557,553 |
overall_officials |
People responsible for overall scientific leadership | 519,601 |
search_term_results |
494,618 | |
intervention_other_names |
Synonymous names for interventions | 470,456 |
facility_contacts |
Contact information at each study facility | 409,886 |
outcome_analyses |
Statistical analyses performed on outcomes | 315,026 |
baseline_counts |
Sample sizes at baseline for each study group | 230,199 |
facility_investigators |
Investigator names at each study facility | 223,509 |
central_contacts |
Primary and backup contacts for enrollment questions | 217,960 |
ipd_information_types |
Individual participant data sharing information types | 87,849 |
provided_documents |
Protocol, SAP, and informed consent form documents | 78,018 |
result_contacts |
Points of contact for scientific information about results | 76,963 |
result_agreements |
Agreements between sponsor and principal investigators about results | 76,963 |
participant_flows |
Recruitment and pre-assignment details | 76,963 |
links |
Web links relevant to the study | 74,921 |
pending_results |
Events related to submission of results for QC review | 32,304 |
documents |
Full study protocol and statistical analysis plan | 10,692 |
retractions |
Retraction notices for study results or publications | 334 |
search_terms |
186 |
Data Source
AACT (Aggregate Analysis of ClinicalTrials.gov) -- maintained by the Clinical Trials Transformation Initiative (CTTI). Updated daily from ClinicalTrials.gov. This is public domain U.S. government data.
License
Database build code: MIT. Underlying data: public domain (U.S. government work).
GitHub
Full source code, build instructions, and data dictionary: github.com/ian-nason/clinicaltrials-database