# A single oncology trial data trust with mandatory deposit within eighteen months

Source: https://onco.cc/ideas/idea-fund-trial-data-trust/  
OnCo record `idea-fund-trial-data-trust` (Idea). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Every cancer trial's anonymised patient-level data would go into one trusted repository within eighteen months of completion, with a single access committee, so researchers can re-analyse, pool and learn from trials that today stay locked up.

## Summary

Consolidate the existing sharing platforms (Vivli, Project Data Sphere, YODA, ClinicalStudyDataRequest) into a single oncology data trust with a legal duty to deposit individual participant data, protocols and analysis code within eighteen months of primary completion for all trials whose results support a regulatory decision or that receive public funding. One independent access committee, standard data formats (CDISC), a secure analysis environment and a public catalogue. Trials in oncology already have among the highest voluntary sharing rates but access remains slow and fragmented, and negative or discontinued trials are rarely deposited at all.

## Fields

- Kind: Idea
- Last checked: 2026-09-08
- Hypothesis: Mandatory deposit raises the proportion of registration oncology trials with accessible individual participant data from a minority to above 80% within three years, and the median time from request to data access falls below sixty days.
- Rationale: The EMA's clinical data publication policy and the ICMJE data-sharing statement requirement increased availability without harming sponsors; pooled analyses from shared data (for example Project Data Sphere control-arm analyses) have already produced prognostic tools and answered questions no single trial could.
- Proposed test: A group of funders and one regulator make deposit a condition of funding and approval for two years; measure deposit compliance, access time and the number of secondary analyses published.
- Maturity: early-clinical
- Actor: data

## Sources

- Vivli: https://vivli.org/
- Project Data Sphere: https://www.projectdatasphere.org/
- YODA Project: https://yoda.yale.edu/

## Connected records

- collections: [ClinicalTrials.gov](https://onco.cc/collections/clinicaltrials-gov/)
- ideas: [A commons for leftover trial biospecimens with standard access for approved research](https://onco.cc/ideas/idea-fund-trial-biospecimen-commons/), [A federated learning consortium of cancer centres that jointly own the models](https://onco.cc/ideas/idea-fund-federated-learning-consortium/), [A public registry of stalled academic assets and shelved company compounds](https://onco.cc/ideas/idea-fund-stalled-asset-registry/), [A shared library of pooled control arms to shrink and speed future trials](https://onco.cc/ideas/idea-fund-control-arm-commons/), [An antitrust safe harbour for cross-company combination trials and data pooling](https://onco.cc/ideas/idea-fund-antitrust-safe-harbour/), [Government reinsurance for phase 2 failures of first-in-class cancer drugs](https://onco.cc/ideas/idea-fund-phase-two-failure-reinsurance/), [Patient-held portable consent for reusing samples and data across studies](https://onco.cc/ideas/idea-fund-portable-patient-consent/)
- terms: [Real-world evidence](https://onco.cc/terms/real-world-evidence/)
- bottlenecks: [Data silos](https://onco.cc/bottlenecks/b-data-silos/), [Failures are hidden](https://onco.cc/bottlenecks/b-negative-results/), [Secrecy and intellectual property block collaboration](https://onco.cc/bottlenecks/b-ip-collaboration/)

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