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Effects of Transcutaneous Vagus Nerve Stimulation in Parkinson´s Disease (tVNS_PD)

15. maj 2026 opdateret af: Alicia Martínez Rodríguez, Universidade da Coruña

Effects of Transcutaneous Stimulation of the Auricular Branch of the Vagus Nerve in Parkinson´s Disease

This study aims to determine whether electrical stimulation of the ear, when combined with physical and speech therapy, can improve symptoms in subjects diagnosed with Parkinson´s disease, by comparing two different application sites.

Each subject will undergo an initial in-person screening and provide consent before participating in the study.

The main questions to answer are:

  • Does transcutaneous electrical nerve stimulation (tVNS) in the ear paired with physical and speech therapy improve speech and voice-related problems, airway protection, salivation, and swallowing?
  • Does tVNS paired with physical and speech therapy improve tremor, walking speed, and balance in people with PD?
  • Does tVNS paired with physical and speech therapy improve heart rate and heart rate variability in people with PD?
  • Do its effects persist at 8 weeks?

Participants will:

Attend 12 rehabilitation sessions over 4 weeks (three per week). During each session, participants received either active or sham tVNS, accompanied by speech therapy (once per week), physical therapy (once per week), or conducted alone (once per week).

Undergo speech, voice, swallowing, respiratory, gait, balance, tremor, heart rate variability, and cognitive testing, as well as questionnaires regarding the quality of life, before and after treatment.

Return for a follow-up visit eight weeks after therapy to check how long the effects last.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Parkinson's disease (PD) is the second most common neurodegenerative disorder after Alzheimer's disease. Most people with PD will experience dysfunction of the autonomic nervous system (ANS), although the severity of this dysfunction can vary widely, affecting both physical and mental well-being. Symptoms are typically classified as motor or non-motor. Prominent motor symptoms of PD include bradykinesia, rigidity, tremor, and abnormalities in gait, balance, and posture. These symptoms are associated with falls and have a very negative impact on quality of life. In addition, impaired fine motor skills, combined with respiratory and other problems, significantly affect voice, speech, and swallowing, as well as other non-motor disorders, such as neuropsychiatric, sleep, sensory, and digestive disorders.

This study is a double-blind, randomized, controlled trial designed to evaluate the efficacy of transcutaneous auricular vagus nerve stimulation on the motor and non-motor effects of Parkinson´s Disease (PD). Investigators will recruit up to 46 patients. The volunteers will be randomized by sex and the Hoehn and Yahr stage. Clinical information and, specifically, Unified Parkinson's Disease Rating Scale (UPDRS) -III (section III) will be assessed initially.

The primary variable of the study will be voice variables, such as volume, jitter, and shimmer. The remaining dependent variables will be other voice and acustic measures; the presence and severity of dysphagia; the presence and severity of xerostomia and sialorrhea; swallowing efficiency, peak cough flow; the level of tremor; the severity of gait dysfunction; balance; cognitive ability regarding concentration and response inhibition; heart rate and heart rate variability; quality of life in PD; adverse effects; and the degree of effectiveness of blinding.

Over the course of 4 weeks, participants will receive 30-minute stimulation sessions three times weekly, along with physiotherapy and speech therapy once per week. One group will be assigned to stimulation in the cymba concha (where the vagus nerve is placed) and the other (sham) in the earlobe.

Data collection will occur at baseline (T0), post-intervention (T1- 4 weeks), and 8 weeks after finishing the intervention (T2), except for the intensity required to administer electrical stimulation and adverse effects, which will be studied during the whole intervention. Tolerance will be assessed on day 1 of stimulation and on day 12 (4 weeks). Statistical analyses will employ mixed-model approaches to evaluate changes in outcome measures over time and between interventions.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

46

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

  • Navn: Alicia Martínez-Rodríguez alicia.martinez@udc.es, Lecturer
  • Telefonnummer: +34 881015851
  • E-mail: alicia.martinez@udc.es

Undersøgelse Kontakt Backup

Studiesteder

  • Spanien
      • A Coruña, Spanien, 15008
        • Rekruttering
        • Association of Parkinson´s Disease Galicia- Coruña
        • Kontakt:
        • Underforsker:
          • Alba Gómez-Rodríguez, Ph.D. student
        • Underforsker:
          • María Belén López-Ferreiro
        • Underforsker:
          • Sandra García González
        • Underforsker:
          • María Rodríguez Losada

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Barn
  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Being a member of the Association or be interested in joining;
  • Idiopathic PD diagnosis, stages 2-3 according to the Hoehn & Yahr scale; confirmed by neurologist
  • Ability to walk independently for at least 1 minute ant turn 180° without assistance;
  • Exhibiting symptoms of hypokinetic dysarthria;
  • On stable dopaminergic therapy for at least 1 month prior to the experiment

Exclusion Criteria:

  • Any contraindication for taVNS (e.g., ear lesions, pacemakers, defibrillators, or other electronic devices)
  • Previous vagotomy or previous application of electrical stimulation to the ear or brain, or treatment with high-intensity focused ultrasound (HIFU)
  • Voice or speech disorders caused by other medical conditions
  • MoCA score below 21
  • Psychotic symptoms or hallucinations; a diagnosis of psychiatric illness
  • Systolic blood pressure above 160 mm Hg, and diastolic blood pressure above 100 mm Hg
  • Inability to attend sessions;
  • Concomitant neurological, orthopaedic, cardiac, respiratory or active medical/oncological condition that would affect participation

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Aktiv komparator: Active tVNS paired with conventional Speech Therapy and Physical Therapy
Participants in this arm will receive transcutaneous electrical stimulation applied to the concha of the left ear for 30 minutes, three times a week, over a 4-week period. This location is known to be innervated by the auricular branch of the vagus nerve. In addition, a speech therapy session and a physical therapy session will be added once a week each, while receiving the electrical stimulation.
Enhed: Transcutaneous Electrical Nerve Stimulation (TENS) of Vagus Nerve
The tVNS will be performed at 200 microseconds, with frequencies ranging from 20 to 200 Hz (30 seconds/30 seconds) for 30 minutes, in the area innervated by the auricular branch of the vagus nerve (cymba concha and concha). The individually titrated intensity will be set above the sensory threshold (intense tingling sensation) but below the level of discomfort.
Andre navne:
  • taVNS
  • tVNS
  • transkutan aurikulær vagus nervestimulation
Andet: Conventional Physical therapy
Physical therapy delivered to both groups consists of exercises aimed at posture alignment and body coordination, static and dynamic balance improvement, and gait quality. It will be delivered once a week, during a session of electrical stimulation.
Andet: Conventional Speech Therapy
It will focus on the orofacial muscles, the acquisition of a diaphragmatic-abdominal breathing pattern that integrates breathing with vocal production, voice training with exercises that enhance vocal quality and prosody, articulation exercises to improve speech clarity, and swallowing training. It will be administered once a week, during one of the three electrical stimulation sessions.
Sham-komparator: Sham tVNS paired with Speech Therapy and Physical Therapy
Participants in this arm will receive the same transcutaneous electrical stimulation as the active group, but applied to the earlobe, a site not innervated by the vagus nerve. The procedure, the appearance of the device, and the parameters are identical to those of the active condition to maintain participant blinding. In addition, a speech therapy session and a physical therapy session will be added once a week each, while receiving the electrical stimulation.
Andet: Conventional Physical therapy
Physical therapy delivered to both groups consists of exercises aimed at posture alignment and body coordination, static and dynamic balance improvement, and gait quality. It will be delivered once a week, during a session of electrical stimulation.
Andet: Conventional Speech Therapy
It will focus on the orofacial muscles, the acquisition of a diaphragmatic-abdominal breathing pattern that integrates breathing with vocal production, voice training with exercises that enhance vocal quality and prosody, articulation exercises to improve speech clarity, and swallowing training. It will be administered once a week, during one of the three electrical stimulation sessions.
Enhed: Sham Transcutaneous Electrical Stimulation of Vagus Nerve
The sham- tVNS will be performed at 200 microseconds, with frequencies ranging from 20 to 200 Hz (30 seconds/30 seconds) for 30 minutes, with electrodes placed on the earlobe, which lacks vagus nerve innervation. The individually titrated intensity will be set above the sensory threshold (intense tingling sensation) but below the level of discomfort.
Andre navne:
  • Sham location
  • sham-tVNS
  • sham- taVNS
  • sham transcutaneous vagus nerve stimulation

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Voice intensity
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The PRAAT software will be used to test the voice twice, when sustaining till 10 seconds the vowel "a" and when reading a text at their usual volume. The intensity (voice volume, measured in decibels) will be recorded.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Voice- Jitter
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
It is derived from the sustaining till 10 seconds the vowel "a". Then, PRAAT software will be used to test the voice, discarding the beginning and the end. The Jitter is defined as the variation in frequency from cycle to cycle, a measure of vocal instability, expressed as a percentage. The higher the percentage, the more irregularities the voice will have.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Voice- Shimmer
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
It is derived from the sustaining till 10 seconds the vowel "a". Then, PRAAT software will be used to test the voice, discarding the beginning and the end. The Shimmer refers to the variation in the amplitude of the sound wave. It is a measure of vocal instability, expressed as a percentage. The higher the percentage, the more irregularities the voice will have.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Voice fundamental frequency (F0)
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The PRAAT software will be used to test the voice twice, when sustaining till 10 seconds the vowel "a" and when reading a text at their usual volume. The fundamental frequency (F0) is the oscillation originating from the vocal folds. It will be recorded in Hz.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Harmonic to Noise Ratio (HNR)
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The PRAAT software will be used to test the voice twice, when sustaining till 10 seconds the vowel "a" and when reading a text at their usual volume. The Harmonic to Noise Ratio (HNR), a measure of the ratio between the periodic and non-periodic components that make up a segment of spoken voice, will be recorded. This ratio reflects the efficiency of sound production; that is, the greater the amount of airflow converted from the lungs into vocal cord vibration energy, the higher the HNR will be. A low HNR indicates a weak voice and dysphonia.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Maximum phonation time (MPT)
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The participant will be asked to sustain the vowel /a/ for as long as possible after a deep inhalation. It will be repeated three times, and the best value will be recorded. The maximum phonation time (MPT) will be measured in seconds. The same procedure will be taken for the /s/.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Maximum expiratory time during sustained /s/
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The participant will be asked to sustain the /s/ sound for as long as possible after a deep inhalation. It will be repeated three times, and the best value in seconds will be recorded.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Index s/a
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The index s/a is used to compare respiratory with laryngeal function, based on the assumption that the two are similar, so the ratio should be 1.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Diadihokinetic rates (DDK)
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Diadochokinesis measures the ability to perform rapid, alternating muscle movements in a repetitive manner. It assesses the rate and regularity of consonant-vowel repetitions /pa-ta-ka/. The individual is instructed to repeat the syllables /pa-ta-ka/ as quickly and accurately as possible for 10 seconds. The higher the value, the better.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Self-perceived handicap associated with dysphonia: Voice Handicap Index (VHI-10)
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The Voice Handicap Index- 10 (VHI-10) is a valid instrument for assessing self-perceived disability associated with dysphonia. It consists of 10 items designed to evaluate patients´ perception of the impact of voice disorders on their quality of life. Each item contains specific questions related to the functional, emotional, and physical aspects of the voice. The patient must answer on a Likert-type scale with options ranging from 0 (never) to 4 (always). The total score is obtained by summing the responses, with a range of 0 to 40, where higher scores indicate a greater degree of vocal impairment.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Salivation
Tidsramme: Baseline (T0), post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
To measure salivation, a dry cloth will be placed in the mouth and weighed after 2 minutes without swallowing to estimate the volume of saliva produced. Changes in weight will be recorded. A higher final weight-and thus a greater difference-indicates increased saliva production.
Baseline (T0), post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Swallowing- dysphagia
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
It will be measured by Repetitive Saliva Swallowing Test (RSST), where the patient is asked to swallow saliva as many times as possible for 30 s, while deglutition is counted through palpation of the larynx. A value below 3 swallows has been found to be pathological.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Cookie Swallow Test
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Time will be measured (velocity), swallow security and efficacy, checking for any residue after swallowing.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Timed Water Swallow Test (TWST)
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The time taken to consume 150 mL of bottled water and the swallowing capacity (mL/s) will be measured, as well as efficacy and safety. We will assess whether there has been a reduction in swallowing time, indicating an improvement in swallowing ability.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Sialorrhea
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The Sialorrhea Clinical Scale for Parkinson´s Disease assesses sialorrhea; drooling severity, drooling frequency and impact on daily life,. It is a Likert-type 7-item. Each item is ranked on a scale of 0 to 3, with a maximum score of 21. Higher scores correspond to greater disability.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Cough Peak Flow (CPF)
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow
It measures the maximum amount of air exhaled by coughing after taking a deep breath, using the best of three attempts. The A CPF above 270 L/min is associated with an effective cough and good ability to expel secretions. In contrast, a CPF below 160 L/min is considered an ineffective cough, with a higher likelihood of respiratory complications.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow
Cognitive ability to concentrate and inhibit responses- Flanker test
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The Flanker test is designed to assess selective attention and inhibitory function, indicating the direction of a central row, flanked by non-target stimuli, which can be congruent (matching the target) or incongruent (opposite to the target). It will be done using an app (C2 Flanker Task) on a tablet with both thumbs at the same time. The reaction time is measured, with higher times indicating less ability to suppress responses to distracting stimuli while focusing on a target stimulus.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Hand tremor
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The tremor in left hand will be measured with the app (G-Sensor Logger) for a minute, using a mobile phone secured to the hand.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Static balance- distances
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
For static balance, a baropodometric platform will be used, and the centre of pressure area (mm), the ellipse area (mm2), and the displacements in the axes of space (mm) will be measured, with eyes open, twice.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Static balance- velocity
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
For static balance, a baropodometric platform will be used, and the speed (mm/s) of displacements along the axes of space will be measured, with eyes open, twice.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Dynamic balance and functional mobility
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
The Timed Up and Go test (TUG) represents a measure of global ambulation skills. The patient sits back in a standard chair and, on the command "go", the patient rises, walks 3 meters at a comfortable and safe pace, turns, walks back to the chair and sits down. Time for each attempt is recorded. The best result from 3 attempts will be selected. The longer it takes to complete, the worse the situation becomes, with 12 seconds being the cutoff point for the risk of falling.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Heart Rate Variability (HRV)- frequency domain
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)

Heart Rate Variability (HRV) using Kubios app and H10 polar heart rate monitor chest strap in periods of 5 minutes:

Frequency domain; ratio LF/HF power will be calculated along with normalised LF/HF where baseline values will set to 1; Low frequency (LF, referred to HRV frequency band 0.04-0.15 Hz); High frequency (HF = HRV frequency band 0.15-0.4 Hz); absolute powers of LF, and HF bands (ms2); normalized power (powers of LF and HF bands in normalised units, %)
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Heart Rate Variability (HRV)- time domain
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)

Heart Rate Variability (HRV) using Kubios app and H10 polar heart rate monitor chest strap in periods of 5 minutes:

Time domain: RR (mean values of RR intervals in ms) ; SDNN (Standard deviation of RR intervals); RMSSD (Root mean square of successive RR interval differences, in ms)
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Heart Rate Variability (HRV)- Global measures
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)

Heart Rate Variability (HRV) using Kubios app and H10 polar heart rate monitor chest strap in periods of 5 minutes:

Global measures: Stress Index (SI), square root of Baevsky's stress index; Parasympathetic nervous system (PNS) index; Sympathetic nervous system (SNS) index
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Quality of life in Parkinson´s Disease (PDQ-8)
Tidsramme: Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Quality of life will be assessed using the Parkinson's Disease Questionnaire-8 (PDQ-8), which measures mobility, activities of daily living, emotional well-being, stigma, social support, cognition, communication, and bodily discomfort. Each item is scored on a 0 (= never) to 4 (= always or cannot do at all) range, so the lowest and highest possible scores are 0 and 32, respectively. Greater scores indicate poorer quality of life.
Baseline (T0), Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)

Andre resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Effectiveness of blinding
Tidsramme: Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Participants will be asked what stimulation they think they have just received, active or placebo (or what is their best guess) and why. Comparison of participants´perceptions with the actual assignment, James Bang Index.
Post-intervention (T1, 4 weeks), along with an 8-week post-trial follow-up (T2)
Adverse effects
Tidsramme: All days of intervention (up to 4 weeks)
A questionnaire will be used to test the presence, severity, persistence and causality of ear pain, headache, tingling, itching, redness, irritation, pressure, dizziness, nausea, vertigo, fatigue, vertigo, palpitations, tinnitus, unpleasant feeling, and/or other effects.
All days of intervention (up to 4 weeks)
Tolerance to auricular TENS
Tidsramme: Baseline and week-4
The level of tolerance of the entire stimulation (by electrical stimulation, by electrodes, or by both) will be measured on a VAS scale from 0 (no discomfort at all) to 10 (the discomfort would have prevented me from finishing the session).
Baseline and week-4
Amplitude of electrical stimulation
Tidsramme: All days of intervention (up to 4 weeks)
Amplitude used in the auricular electrical stimulation in mA, as well as the sensory and discomfort threshold.
All days of intervention (up to 4 weeks)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Universidade da Coruña

Samarbejdspartnere

Parkinson´s Association Galicia-Coruña

Efterforskere

  • Ledende efterforsker: Alicia Martínez-Rodríguez, Lecrurer, Universidade da Coruña
  • Ledende efterforsker: Olalla Bello, Lecurer, Universidade da Coruña

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. maj 2026

Primær færdiggørelse (Anslået)

1. september 2026

Studieafslutning (Anslået)

1. november 2026

Datoer for studieregistrering

Først indsendt

23. april 2026

Først indsendt, der opfyldte QC-kriterier

11. maj 2026

Først opslået (Faktiske)

14. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

19. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2025/295_II

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IPD-delingstidsramme

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IPD-delingsadgangskriterier

The results will be included in a document that will be shared on Zenodo with all investigators interested in them via direct access.

IPD-deling Understøttende informationstype

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