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Massive canadian study aims to uncover ADHD's hidden toll on women

NCT ID NCT07597707

Knowledge-focused Sponsor: University of Calgary Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This observational study will follow 1,460 girls and women (age 10+) with and without ADHD across Canada. Participants complete surveys about their mental health, hormones, and life experiences. The goal is to build a detailed picture of how ADHD affects females over their lifespan, with no treatment or intervention involved.

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 successful, this study could reveal how ADHD affects girls and women differently across life stages, pointing toward better support and care strategies.
What could go wrong
This is an observational study, not a treatment trial. It relies on self-reported data, which may not capture the full picture. Results will not directly lead to a new therapy.

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

About 1,460 people

The number the study aims to enrol. It can still change while the study runs.

Started

Aug 2025

Expected to finish

Dec 2026

An estimate. End dates often move.

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

Recruitment will occur via multiple methods. Advertisements will be posted in communities across Canada (e.g., in medical clinics, ADHD clinics, community centres, etc.) via flyers and posters. In addition, recruitment materials will be posted online through social media posts (e.g., Instagram, Facebook, and LinkedIn), and University websites (e.g., The University of Calgary's 'Participate in Research' website). Potential participants will also be free to share recruitment information through their personal social media/email platforms or forward recruitment information to others, and study collaborators will disseminate recruitment information through their available channels and through community partner organizations. Lastly, eligible participants who have previously enrolled in our research studies and have consented to be contacted for future studies will be invited to participate.

Ages

10 years and older

Sex

Female participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Assigned female at birth or identify as girl or women * Fluency in English or French * Aged 10 years or older * Currently reside in Canada * Access to technology to complete study measures Exclusion Criteria: * Self-reported intellectual disability

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Conditions

The condition(s) this trial relates to.

attention deficit hyperactivity disorder, inattentive type attention deficit-hyperactivity disorder

As listed by the trial registrant

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

ADHD

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • University of Calgary

    RECRUITING

    Calgary, Alberta, T2N 1N4, Canada

More trials for these conditions

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