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Could your finger length reveal why You're Double-Jointed?

NCT ID NCT07157930

Knowledge-focused Sponsor: Nigde Omer Halisdemir 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 examined 180 young adults to see if the ratio of their index to ring finger length (2D:4D) is linked to joint hypermobility (being double-jointed). The idea is that this finger ratio may reflect hormone levels before birth. Researchers measured joint flexibility using the Beighton score and compared finger lengths between those with and without hypermobility. The goal was to explore a possible connection, not to test a treatment.

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 this study finds a link, it could help doctors understand why some people have joint hypermobility, possibly leading to better diagnosis or early intervention.
What could go wrong
This is a small, completed observational study, not a treatment trial. The results may not apply to everyone, and the finger ratio is just one possible clue among many.

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

180 people

The number who actually took part.

Started

Aug 2025

Finished

Dec 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

The study planned to include individuals with (Beighton skorlamasına göre 9 üzerinden 5 ve daha fazla puan alan) and without joint hypermobility. Individuals between the ages of 18 and 35 will be included.

Ages

18 to 35 years

Sex

Anyone

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: * Individuals aged 18-35 * Individuals who scored 5 out of 9 or higher on the Beighton score * Control group: Those with a Beighton score of ≤ 4 Exclusion Criteria: * Individuals with any pathology related to the musculoskeletal system * Individuals diagnosed with metabolic, neurological, or genetic diseases (tissue diseases such as Ehlers-Danlos syndrome and Marfan syndrome) * Those with a history of surgery within the last 6 months * Those who are pregnant or breastfeeding

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Conditions

The condition(s) this trial relates to.

hypermobility spectrum disorder hypermobility syndrome Joint Instability sleep disorder

As listed by the trial registrant

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

Androgen effect Healty controls Hormonal Joint hypermobility Sleep

Contacts and locations

Locations

  • Nigde Omer Halisdemir University

    Niğde, Turkey (Türkiye)

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