Where do trial phases go quiet in CT.gov?

Project

This landing page is meant to make the phase story visible immediately on GitHub Pages, with the main dashboard surfaced at the top and the rest of the series linked nearby.

Open dashboard at root Read E156 micro-paper Open protocol Open series hub

Phase I is the quietest major phase on rate, but the NA bucket is where the largest unresolved stock accumulates.

Phase comparison

A standalone E156 project on how reporting gaps change by trial phase, showing that phase structure matters alongside sponsor class.

Interventional

441,191

All phase-labelled studies

Closed interventional

290,524

Primary set

Phase I rate

76.7%

Highest phase-specific rate

NA stock

96,605

Largest unresolved count

Phase rate

Phase I is worst on rate, while the large NA bucket remains close behind and dominates by scale.

This first chart should be read alongside the stock chart below, because phase I and the NA bucket answer different versions of the same transparency question.

Read Across Projects

Across The Series

The split projects are meant to be read together: one for industry, one for sponsor classes, one for phases, and one for structural missingness.

Industry Disclosure Gap

CT.gov Industry Disclosure Gap

A standalone E156 project on how much long-past non-disclosure and structural sparsity remain inside industry-linked ClinicalTrials.gov records.

Sponsor-Class Hiddenness

CT.gov Sponsor-Class Hiddenness

A standalone E156 project comparing sponsor classes on rate, stock, and structural sparsity rather than flattening everything into one leaderboard.

Structural Missingness

CT.gov Structural Missingness

A standalone E156 project on the descriptive fields that disappear from ClinicalTrials.gov even before results reporting is considered.