New study tracks joint health in hemophilia a patients on prophylaxis
NCT ID NCT06684314
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study in Taiwan will follow about 100 people with moderate to severe hemophilia A who are already taking efanesoctocog alfa (a clotting factor) as part of their routine care. Researchers will track joint health, bleeding rates, and safety over up to 5 years using medical records and imaging. The goal is to see how well the medicine works in everyday life to protect joints and reduce bleeds.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- efanesoctocog alfa (a clotting factor medicine)
- What this could lead to
- If successful, this study could show that efanesoctocog alfa helps protect joints and reduce bleeding in people with hemophilia A in real-world use.
- What could go wrong
- This is an observational study, not a controlled trial, so results may be influenced by other factors. It is also small (100 participants) and limited to Taiwan, so findings may not apply broadly.
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
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About 100 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Nov 2024
- Expected to finish
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Aug 2031
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Participants from medical centers in Taiwan will be enrolled in the study after the introduction of efanesoctocog alfa for the treatment of hemophilia A. Eligible participants will include all ages, sexes and moderate to severe hemophilia A severities under efanesoctocog alfa prophylaxis treatment and able to undergo joint and/or MRI examinations during routine clinical practice.
- Ages
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Children (under 18), adults (18 to 64) and older adults (65 and over)
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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: * Participants with all ages and diagnosis of moderate-severe hemophilia A without current and/or at least three years of un-detectable inhibitor (\<0.6 BU) * Participants with moderate to severe hemophilia A as defined by FVIII level ≤ 5% * Participants starting efanesoctocog alfa prophylaxis treatment as per standard of care no more than three months prior to the enrollment date * Participants aged 6 years and older are able to undergo MRI examinations (sedation given, if necessary, and per investigator discretion) * Participants are able to undergo joint examinations * Physician's decision to treat the participant with efanesoctocog alfa is made prior to and independently of participation in the study * Signed and dated informed consent provided by the participant, or by the participant's legally acceptable representative for participants under the legal age before any study-related activities are undertaken. Assent should be obtained for pediatric participants according to local regulations Exclusion Criteria: * Participants with coagulation disorders other than hemophilia A * Participants diagnosed with other known bleeding disorder * Participants currently receive factor therapy and have signs of decreased response to FVIII therapy * Participants with a baseline Radiological Pettersson score (PS) of greater than 6 for each individual ankle * Enrollment in another concurrent clinical interventional study, or intake of an Investigational Medicinal Product within 3 months prior to inclusion in this study * Pregnant female participants The above information is not intended to contain all considerations relevant to a potential participation in a clinical trial.
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Genom att skicka in godkänner du våra Användarvillkor
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The study's own enquiry address
This study publishes an address for enquiries. See it below .
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The places running it
10 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
Show contact details
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Genom att skicka in godkänner du våra Användarvillkor
Study contacts
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Contact
Email: •••••@•••••
Locations
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Investigational Site Number : 1580001
RECRUITINGTaipei, 100, Taiwan
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Investigational Site Number : 1580002
RECRUITINGTaipei, 114, Taiwan
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Investigational Site Number : 1580003
RECRUITINGTaipei, 110, Taiwan
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Investigational Site Number : 1580004
RECRUITINGTaoyuan City, 33305, Taiwan
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Investigational Site Number : 1580005
RECRUITINGTaichung, 40201, Taiwan
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Investigational Site Number : 1580006
RECRUITINGTaichung, 40447, Taiwan
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Investigational Site Number : 1580007
RECRUITINGTaichung, 40705, Taiwan
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Investigational Site Number : 1580008
RECRUITINGChanghua, 500, Taiwan
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Investigational Site Number : 1580009
RECRUITINGKaohsiung City, 807, Taiwan
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Investigational Site Number : 1580010
RECRUITINGKaohsiung City, 83301, Taiwan
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a newer clotting factor keep its effectiveness in hemophilia a?
- Can a new injection tame hemophilia a bleeding?
- A Once-a-Week shot could transform hemophilia Care—Even for those with inhibitors
- Can a new clotting factor offer better bleed protection for severe hemophilia?
- Do newer hemophilia drugs protect joints better? study aims to find out
- Newborn screening study aims to catch rare diseases at birth