Mahmood Ahmad
Tahir Heart Institute
author@example.com

Protocol: CT.gov Country Sponsor Repeaters

This protocol explodes eligible older closed interventional ClinicalTrials.gov studies into country-linked portfolios and ranks lead sponsors within selected national footprints. Primary outputs compare sponsor-level missing-results counts, no-results rates, ghost-protocol rates, and fully visible shares across United States, China, Egypt, Poland, Australia, and Japan-linked studies. The aim is to test whether the visible backlog resolves into different institutional repeater structures once country-linked portfolios are isolated. Because country links come from recorded study locations, the analysis measures country involvement rather than sponsor domicile, enrollment shares, or national legal exposure.

Outside Notes

Type: protocol
Primary estimand: Sponsor-level missing-results counts within selected country-linked older CT.gov portfolios
App: CT.gov Country Sponsor Repeaters dashboard
Code: https://github.com/mahmood726-cyber/ctgov-country-sponsor-repeaters
Date: 2026-03-29
Validation: FULL REGISTRY RUN

References

1. ClinicalTrials.gov API v2. National Library of Medicine. Accessed March 29, 2026.
2. Zarin DA, Tse T, Williams RJ, Carr S. Trial reporting in ClinicalTrials.gov. N Engl J Med. 2016;375(20):1998-2004.
3. DeVito NJ, Bacon S, Goldacre B. Compliance with legal requirement to report clinical trial results on ClinicalTrials.gov: a cohort study. Lancet. 2020;395(10221):361-369.

AI Disclosure

This work represents a compiler-generated evidence micro-publication built from structured registry data and deterministic summary code. AI was used as a constrained coding and drafting assistant for interface generation, packaging, and prose refinement, not as an autonomous author. The analytical choices, interpretation, and final outputs were reviewed by the author, who takes responsibility for the content.