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Massive study of 190,000 workers to uncover hidden radiation risks

NCT ID NCT05380570

Knowledge-focused Sponsor: Korea Institute of Radiological & Medical Sciences Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study follows about 190,000 Korean radiation workers to see if low-dose radiation exposure over time increases the risk of cancer and other diseases. Researchers will link national health records to track health outcomes. The goal is to better understand the long-term effects of low-level radiation at work.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

196,379 people

The number who actually took part.

Started

Nov 2021

Expected to finish

Mar 2031

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Korean radiation workers in the national dose registry

Ages

16 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Korean radiation workers in the national dose registry (except for diagnostic medical radiation workers) Exclusion Criteria: * Unidentified personal identification numbers * Foreigner

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Conditions

The condition(s) this trial relates to.

acute myeloid leukemia and myelodysplastic syndromes related to radiation Leukemia, Radiation-Induced Neoplasms, Radiation-Induced radiation injury radiation-induced disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Leukemia, radiation-induced Neoplasms, radiation-induced Occupational exposure to radiation Radiation effects

Contacts and locations

Locations

  • Korea Institute of Radiological & Medical Sciences

    Seoul, Nowon-gu, 01812, South Korea