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Hidden iron deficiency may worsen fibromyalgia pain

NCT ID NCT06665516

Knowledge-focused Sponsor: McMaster University 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
Running, but no longer taking on new participants.
Completed This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looked at how many women with fibromyalgia at a pain clinic might have iron deficiency. 81 women completed a questionnaire about symptoms like heavy periods and past iron issues. The goal was to see if iron deficiency is common and if treating it could help their pain.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If iron deficiency is found to be common and treatment improves pain, this could point toward a simple way to help some women with fibromyalgia.
What could go wrong
This is a small, completed observational study with only 81 participants. It only measured risk through questionnaires, not actual blood tests, so results may not be reliable or apply to everyone.

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

81 people

The number who actually took part.

Started

Mar 2025

Finished

Jun 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Who is studied

Female patients attending the DeGroote Pain Clinic

Ages

18 to 49 years

Sex

Female participants only

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: * Patient at the DeGroote Pain Clinic * Menstruating women between the ages of 18-49 * Willingness to complete the questionnaire, and undergo laboratory tests if indicated. Exclusion Criteria: * The only exclusion criteria is unwillingness to participate

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Conditions

The condition(s) this trial relates to.

agnosia Chronic Pain Coitus fibromyalgia Iron Deficiencies iron deficiency anemia

As listed by the trial registrant

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

Fibromyalgia Iron-deficiency

Contacts and locations

Locations

  • DeGroote Pain Clinic

    Hamilton, Ontario, L8S 4L8, Canada

More trials for these conditions

Other studies related to the condition(s) this trial covers.