CT.gov Condition Ancient Backlog
2026-03-29 | full-registry ct.gov audit | plots, figures, and e156 bundle
Series
Condition Ancient-Backlog Project

Which therapeutic portfolios still hold the oldest CT.gov backlog?

A standalone public project on therapeutic ancient backlog, showing that oncology, diffuse OTHER stock, cardiovascular, and metabolic portfolios still carry the heaviest old unresolved CT.gov burden.

Oncology 11,369
Other 10,899
Cardio 6,545
Metabolic 4,693

Project

This page asks which therapeutic portfolios still hold the oldest unresolved CT.gov records once the backlog is narrowed to studies silent for more than ten overdue years past the reporting mark.

Ancient backlog is not just a sponsor story. Major disease portfolios and healthy-volunteer studies also carry very old unresolved CT.gov stock.

Project readout

A standalone E156 project on which therapeutic portfolios still hold the deepest stock of unresolved CT.gov studies more than a decade beyond the reporting window.

Oncology stock
11,369
Ancient-backlog studies
Other stock
10,899
Ancient-backlog studies
Cardio stock
6,545
Ancient-backlog studies
Healthy-vol rate
31.5%
Large-family rate
Ancient backlog stock
ANCIENT STOCKStudies unresolved more than ten overdue years beyond the two-year markOncology11,369Other10,899Cardiovascular6,545Metabolic4,693Healthy volunteers4,441Infectious disease4,217Mental health3,499Musculoskeletal and pain3,390Respiratory and sleep2,250Neurology1,876
Very old unresolved CT.gov stock is concentrated in a small slice of the table.
Ancient backlog isolates studies still unresolved more than a decade after the reporting window closed.
Read Across Projects

Across The Series

The split projects are meant to be read together because each isolates a different dimension of registry opacity rather than forcing every question into one leaderboard.

Industry
Industry project

Industry project from the CT.gov hiddenness series.

Sponsor-Class
Sponsor-class project

Sponsor-class project from the CT.gov hiddenness series.

Phase
Phase project

Phase project from the CT.gov hiddenness series.

Structural Missingness
Structural missingness project

Structural missingness project from the CT.gov hiddenness series.

Evidence Visibility
Evidence visibility project

Evidence visibility project from the CT.gov hiddenness series.

Completion Cohort
Completion cohort project

Completion cohort project from the CT.gov hiddenness series.

Condition Hiddenness
Condition hiddenness project

Condition hiddenness project from the CT.gov hiddenness series.

Sponsor Concentration
Sponsor concentration project

Sponsor concentration project from the CT.gov hiddenness series.

Rule-Era Reporting
Rule-era reporting project

Rule-era reporting project from the CT.gov hiddenness series.

Publication Undercount
Publication undercount audit

Publication undercount audit from the CT.gov hiddenness series.

Oncology Hiddenness
Oncology hiddenness project

Oncology hiddenness project from the CT.gov hiddenness series.

Cardiovascular Hiddenness
Cardiovascular hiddenness project

Cardiovascular hiddenness project from the CT.gov hiddenness series.

Metabolic Hiddenness
Metabolic hiddenness project

Metabolic hiddenness project from the CT.gov hiddenness series.

Enrollment-Size
Enrollment-size project

Enrollment-size project from the CT.gov hiddenness series.

Geography-Scale
Geography-scale project

Geography-scale project from the CT.gov hiddenness series.

Design-Purpose
Design-purpose project

Design-purpose project from the CT.gov hiddenness series.

Completion-Delay
Completion-delay project

Completion-delay project from the CT.gov hiddenness series.

Trial-Architecture
Trial-architecture project

Trial-architecture project from the CT.gov hiddenness series.

Intervention-Type
Intervention-type project

Intervention-type project from the CT.gov hiddenness series.

Country Reporting
Country reporting project

Country reporting project from the CT.gov hiddenness series.

Stopped-Trial
Stopped-trial project

Stopped-trial project from the CT.gov hiddenness series.

Outcome-Density
Outcome-density project

Outcome-density project from the CT.gov hiddenness series.

Actual-Field
Actual-field project

Actual-field project from the CT.gov hiddenness series.

Us-Versus-Global
US-versus-global project

US-versus-global project from the CT.gov hiddenness series.

Modality-Sponsor
Modality-sponsor project

Modality-sponsor project from the CT.gov hiddenness series.

Country-Condition
Country-condition project

Country-condition project from the CT.gov hiddenness series.

Disease-Geography
Disease-geography project

Disease-geography project from the CT.gov hiddenness series.

Condition-Sponsor
Condition-sponsor project

Condition-sponsor project from the CT.gov hiddenness series.

Country-Sponsor
Country-sponsor project

Country-sponsor project from the CT.gov hiddenness series.

Us-Versus-Ex-Us
US-versus-ex-US project

US-versus-ex-US project from the CT.gov hiddenness series.

Industry-Family
Industry-family project

Industry-family project from the CT.gov hiddenness series.

Risk-Adjusted Hiddenness
Risk-adjusted hiddenness

Risk-adjusted hiddenness from the CT.gov hiddenness series.

Overdue Results Clock
Overdue results clock

Overdue results clock from the CT.gov hiddenness series.

Publication Index Gap
Publication index gap

Publication index gap from the CT.gov hiddenness series.

Probable Act/Fdaaa Debt
Probable ACT/FDAAA debt

Probable ACT/FDAAA debt from the CT.gov hiddenness series.

Sponsor Excess Watchlist
Sponsor excess watchlist

Sponsor excess watchlist from the CT.gov hiddenness series.

Country Excess Watchlist
Country excess watchlist

Country excess watchlist from the CT.gov hiddenness series.

Condition Excess Watchlist
Condition excess watchlist

Condition excess watchlist from the CT.gov hiddenness series.

Black-Box Trials
Black-box trials

Black-box trials from the CT.gov hiddenness series.

Strict-Proxy Repeaters
Strict-proxy repeaters

Strict-proxy repeaters from the CT.gov hiddenness series.

Sponsor Ghost Repeaters
Sponsor ghost repeaters

Sponsor ghost repeaters from the CT.gov hiddenness series.

Country Ghost Watchlist
Country ghost watchlist

Country ghost watchlist from the CT.gov hiddenness series.

Condition Ghost Watchlist
Condition ghost watchlist

Condition ghost watchlist from the CT.gov hiddenness series.

Black-Box Sponsor Repeaters
Black-box sponsor repeaters

Black-box sponsor repeaters from the CT.gov hiddenness series.

Strict-Core Black-Box
Strict-core black-box

Strict-core black-box from the CT.gov hiddenness series.

Sponsor Overdue Debt
Sponsor overdue debt

Sponsor overdue debt from the CT.gov hiddenness series.

Country Overdue Debt
Country overdue debt

Country overdue debt from the CT.gov hiddenness series.

Condition Overdue Debt
Condition overdue debt

Condition overdue debt from the CT.gov hiddenness series.

Narrative-Gap Repeaters
Narrative-gap repeaters

Narrative-gap repeaters from the CT.gov hiddenness series.

Actual-Discipline Repeaters
Actual-discipline repeaters

Actual-discipline repeaters from the CT.gov hiddenness series.

Sponsor Ancient Backlog
Sponsor ancient backlog

Sponsor ancient backlog from the CT.gov hiddenness series.

Country Ancient Backlog
Country ancient backlog

Country ancient backlog from the CT.gov hiddenness series.

Description-Black-Box Repeaters
Description-black-box repeaters

Description-black-box repeaters from the CT.gov hiddenness series.

Completion-Timing Repeaters
Completion-timing repeaters

Completion-timing repeaters from the CT.gov hiddenness series.

Sponsor Ancient
CT.gov Sponsor Ancient Backlog

Named-sponsor tables showing which portfolios still hold the oldest unresolved CT.gov studies more than a decade past deadline.

Country Ancient
CT.gov Country Ancient Backlog

Country-linked tables showing where the oldest unresolved CT.gov stock still accumulates after the reporting window closed long ago.

Description Black Box
CT.gov Description-Black-Box Repeaters

Named-sponsor tables for overdue older studies that are unlinked and missing both detailed description and primary outcome description.

Completion Timing
CT.gov Completion-Timing Repeaters

Named-sponsor tables for older CT.gov studies missing actual primary completion or actual completion timing fields.