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RecruitingNCT03998020SomnobankUpdated Jan 2, 2024

Constitution of a Clinical, Neurophysiological and Biological Cohort for Chronic Sleep Disorders Responsible of Hypersomnolence

An interventional study of scale of severity and blood sample in Somnolence Disorder, Excessive, sponsored by University Hospital, Montpellier. Recruiting at 1 site in France. Open to participants aged 6 Years and older. Per ClinicalTrials.gov, last updated 2024-01-02.

Sponsored by University Hospital, Montpellier · Not applicable, Interventional, and Basic science

From the registry’s dates

  • Started Jun 2020; still recruiting 6 years 4 months later.

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Phase
Not applicable
Study type
Interventional
Enrollment
5,000
Allocation
Not applicable
Ages
6 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 30 studies in Disorders of Excessive Somnolence with a site in France — 9 open to participants now, 10 under way, 4 of them phase 3. Disorders of Excessive Somnolence · France.

Planned enrollment
Largest of 24
5,000 · median 130
Started
2020
the only one that year
No phase
6 of 30
3 open now
Registered
16th of 30
by date

Among the 30 studies in Disorders of Excessive Somnolence with a site in France, this one has the largest planned enrollment of the 24 interventional ones that give a count, is the only one that started in 2020, is one of 6 with no phase, and was the 16th registered.

Disorders of Excessive Somnolence

196 studies on the registry are indexed under Disorders of Excessive Somnolence; 34 are open to participants now.

Browse Disorders of Excessive Somnolence studies →

Open to participants now

9 of the 30 studies in Disorders of Excessive Somnolence with a site in France are open now. Recruiting first, the newest first:

3 more — sign in →

All 9 open studies →

A study can be open while its sites in France have not opened yet or have stopped. Only those recruiting at a site in France →

Who these studies take

Of the 30 Disorders of Excessive Somnolence studies recruiting now, 12 (40%) set no upper age limit and 17 (57%) stop at 75 or younger; 5 take children under 18; 7 take healthy volunteers.

This study: 6 Years and older · all sexes · no healthy volunteers.

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02

Study summary

Chronic sleep disorders result from multiple pathophysiological mechanisms and are often associated with severe hypersomnolence, responsible for major disability. Hypersomnolence may be secondary to sleep disturbances at night by sleep fragmentation, both overall in restless leg syndrome (RLS) or specific to slow or paradoxical sleep in parasomnias (sleepwalking, sleep behavior disorder). paradoxical). Attention-Deficit / Hyperactivity Disorder (ADHD) is another cause of secondary hypersomnolence, unsolved pathophysiology, leading to a major disturbance of alertness. More rarely, hypersomnolence may be primary (central hypersomnia), representing then the most severe form existing in humans. The best-known central hypersomnia is narcolepsy type 1 (NT1), affecting 0.02% of the population. It is thanks to the existence of well-characterized clinical, biological and neuropathological patients that its pathophysiology is better understood. It is due to a selective loss of hypothalamic neurons secreting orexin / hypocretin, in connection with a probable autoimmune process, in genetically predisposed subjects. Narcolepsy type 2 (NT2), idiopathic hypersomnia (HI) and Kleine-Levin syndrome (SKL), are rarer forms of central hypersomnia, the pathophysiology of which is still unknown, due to the small number of patients studied.

Read the detailed description

Chronic sleep disorders result from multiple pathophysiological mechanisms and are often associated with severe hypersomnolence, responsible for major disability. Hypersomnolence may be secondary to sleep disturbances at night by sleep fragmentation, both overall in restless leg syndrome (RLS) or specific to slow or paradoxical sleep in parasomnias (sleepwalking, sleep behavior disorder). paradoxical). Attention-Deficit / Hyperactivity Disorder (ADHD) is another cause of secondary hypersomnolence, unsolved pathophysiology, leading to a major disturbance of alertness. More rarely, hypersomnolence may be primary (central hypersomnia), representing then the most severe form existing in humans. The best-known central hypersomnia is narcolepsy type 1 (NT1), affecting 0.02% of the population. It is thanks to the existence of well-characterized clinical, biological and neuropathological patients that its pathophysiology is better understood. It is due to a selective loss of hypothalamic neurons secreting orexin / hypocretin, in connection with a probable autoimmune process, in genetically predisposed subjects. Narcolepsy type 2 (NT2), idiopathic hypersomnia (HI) and Kleine-Levin syndrome (SKL), are rarer forms of central hypersomnia, the pathophysiology of which is still unknown, due to the small number of patients studied.

Chronic sleep disorders result from multiple pathophysiological mechanisms and the constitution of a clinical, neurophysiological and biological cohort, monocentric. Patients (minors or adults) suffering from chronic sleep disorders responsible for hypersomnolence will be recruited, followed by the Sleep Disorders Unit (UTSE) and the National Reference Center for Rare Hypersomnia (CNRH) in Montpellier. The number of topics to include depends on feasibility criteria including the rarity of certain sleep disorders and recruitment opportunities. At a minimum, 150 subjects per group will be recruited according to the following ratio: NT1 (33%), other central hypersomnias (NT2, HI, SKL, 33%), and hypersomnolence secondary to a neurological sleep or vigilance disorder (ADHD, RLS, parasomnias, 33%). A match on age and sex will be considered

03

Conditions studied

  • Somnolence Disorder, Excessive
04

Who can participate

Ages eligible
6 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Have a complaint of chronic hypersomnolence on questioning, identified by a sleep specialist and requiring objective explorations in the Centre de Hypersomnias Rares, with or without a diagnosis of chronic sleep disorder according to the International Classification scale in force at the time of diagnosis
  • can be treated or not for chronic sleep disorder.
  • speak and understand french
  • should have a social security system
  • should not have infectious or inflammatory pathology

Exclusion criteria

Exclusion Criteria:

  • be private of liberty
  • live in medical institution
  • be a major protected by law
  • not have social security system
  • refuse to participate in protocol
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
5,000 participants (estimated)

Study arms

  • Other
    chronic sleep disorders

    Subjects with chronic sleep disorders responsible of hypersomnolence measured by a scale of severity of sleep disorder, and blood parameters (blood sample)

    Other: scale of severity · Genetic: blood sample

Interventions

  • Otherscale of severity

    assessment of the severity of the sleep disorders by scale

  • Geneticblood sample

    Genetical study, serum and sample

06

What researchers measure

Primary outcomes

  1. Severity of somnolence

    evaluation with sleep latency test, validated questionnaires

    Time frame: Inclusion

Secondary outcomes

  1. level of somnolence

    Physicians Global Assessment to measure the evolution of somnolence

    Time frame: 12 months maximum

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Jun 2020 (actual). Primary completion is estimated for Jun 2030, 120 months after the start.

Of 32 non-industry interventional studies with no phase under Disorders of Excessive Somnolence, half reached primary completion within 22 months of starting (the median), counting those still running; a quarter within 9 and three quarters within 35. This study's planned 120 months is above that.

Counting every sponsor, half of 34 studies reached it within 22 months; a quarter within 7 and three quarters within 35.

How these figures are worked out, and which studies are left out of them.

Registered
Sep 10, 2018
First posted
Jun 25, 2019
StartActual
Jun 16, 2020
Primary completionEst.
Jun 16, 2030
CompletionEst.
Jun 16, 2033
Last update
Jan 2, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jan 2, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03998020
Collaborators
INSERM U1061 Montpellier
Responsible party
Sponsor
First posted
Jun 25, 2019
Start date
Jun 16, 2020
Primary completion
Jun 16, 2030 (estimated)
Completion
Jun 16, 2033 (estimated)
Last update
Jan 2, 2024

Study contacts

Pôle Recherche et Innovation
Contact
depotac@chu-montpellier.fr
0033467330913

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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