Internet-based Cognitive Behavioral Therapy for Chronic Tic Disorder and Tourette’s Disorder: a Feasibility Trial

Learn more about:
Related Clinical Trial
SCI-110 in the Treatment of Tourette Syndrome The Effect of Medical Cannabis on Tics, Premonitory Urge and Psychiatric Comorbidity in Adults With Tourette Syndrome Pilot Trial of Comprehensive Behavioral Intervention for Tics-Enhanced (CBIT-E) Investigating Distress Tolerance in Adults With Tourette Syndrome Open-label MNS for Tourette Syndrome Transcranial Magnetic Stimulation to Augment Behavior Therapy for Tics Internet-based Cognitive Behavioral Therapy for Chronic Tic Disorder and Tourette’s Disorder: a Feasibility Trial Longitudinal Impact of Stressors in Adults With Tourette Syndrome Effects of Lactobacillus Plantarum PS128 in Patients With Tourette’s Syndrome Combined CBIT and rTMS to Improve Tourette’s Syndrome Pimavanserin Treatment in TS Median Nerve Stimulation (MNS) Pilot Extinction Learning in Adults With Tourette Syndrome Observational Database on Deep Brain Stimulation in Tourette Syndrome Influence of Stress and Psychiatric Symptoms on Children With Tourette Syndrome D-cycloserine Augmented Treatment for Youth With Tic Disorders Sensory Symptoms in Tourette Syndrome and Obsessive-Compulsive Disorder Atomoxetine in Patients With Tourette’s Syndrome Deep Brain Stimulation in Forel’s H Field in Tourette’s Syndrome Psychosocial Intervention for Young Children With Chronic Tics Brain Tissue Collection for Neuropathological Studies New Stereotactic Frame System for Neurosurgery Sedation During Microelectrode Recordings Before Deep Brain Stimulation for Movement Disorders. Outcomes Mandate National Integration With Cannabis as Medicine Reliability and Validity of the MINI International Neuropsychiatric Interview for Children and Adolescents (MINI-KID) Brain-Behavior Interactions in Tic Suppression Phase III Study of 5LGr to Treat Tic Disorder Effects of Ondansetron in Obsessive-compulsive and Tic Disorders I-123 Brain Studies of Serotonin Metabolism in Psychiatric Patients and Normal Volunteers Physiological Investigations of Movement Disorders Dissemination of Comprehensive Behavioral Intervention for Tics (CBIT) to Occupational Therapists: A Feasibility Study TicHelper: A Computerized Comprehensive Behavioral Intervention for Tics (CBIT) Safety Study of Galantamine in Tic Disorders Internet-based Coaching for Young Adults With Neuropsychiatric Disorders Modified Comprehensive Behavioral Intervention for Tics (M_CBIT) Incorporating teleCBIT Into a Hospital-Based Tic Program Cognitive Behavior Therapy and Habit Reversal Training for the Treatment of Chronic Tic Disorders in Children An Exploratory Study of Transcranial Magnetic Stimulation (TMS) Based on Functional Magnetic Resonance Imaging (fMRI) in the Treatment of Tic Disorder Brain Stimulation in Movement Disorders Augmentation of Brief Habit Reversal Training With D-cycloserine or Placebo Central Mechanisms in Speech Motor Control Studied With H215O PET Comparison of Keppra and Clonidine in the Treatment of Tics Brain Activation in Vocal and Motor Tics Trial to Demonstrate the Efficacy and Safety of Internet-delivered Behavioral Treatment for Adults With Tic Disorders Assessment of Children With Tic Onset in the Past 6 Months Repetitive Transcranial Magnetic Stimulation to Reduce Tics Guanfacine in Children With Tic Disorders Neuropsychological Functioning Among Children With Tourret’s Disorder and ADHD Investigating Circadian Rhythms in Youth With Persistent Tic Disorders The Role of Probiotics PS128 in Movement Disorders Online Mindfulness-based Tic Reduction (Phase Two) Online Mindfulness-based Tic Reduction Investigation of Neurofeedback With Real-Time fMRI in Healthy Volunteers and Patients With Hyperkinetic Movement Disorders A Handwriting Intervention Program for Children With Tic Disorders Study of Clonidine on Sleep Architecture in Children With Tourette’s Syndrome (TS) and Comorbid ADHD National Gilles De La Tourette Study Group Evaluating the Efficacy and Safety of Yi-Gan San in Children and Adolescents With Tourette’s Disorder Evaluation of a Cognitive Psychophysiological Treatment for Tourette Syndrome and Tic Disorders Magnetic Resonance Spectroscopy to Evaluate Tourette s Syndrome Group Intervention for Children With Chronic Tics Syndrome or Tourette Syndrome: CBIT vs Psycho-Educational Intervention Study of the Neurobiology of Tourette Syndrome and Related Disorders Brain Dynamics Involved in Generating Tics and Controlling Voluntary Movement Dopaminergic Effects on Cortical Function in Tourette’s (Levodopa Protocol) Developmental Phenomenology of Obsessive Compulsive Disorder and Tourette Syndrome in Children and Adolescents Online Remote Behavioural Intervention for Tics (ORBIT) CANNAbinoids in the Treatment of TICS (CANNA-TICS) A Study to Test if TEV-50717 is Effective in Relieving Tics Associated With Tourette Syndrome Internet-delivered Behaviour Therapy for Children and Adolescents With Tourette’s Disorder A Study to Evaluate the Effects of ABX-1431 on Patients With Tourette Syndrome Aripiprazole in the Treatment of Tourette’s Syndrome Aripiprazole in Children and Adolescents With Chronic Tic Disorder or Tourette’s Disorder Phase II Double Blind Placebo Controlled Trial of Risperidone in Tourette Syndrome Phase III Randomized, Double-Blind, Placebo-Controlled Study of Guanfacine for Tourette Syndrome and Attention Deficit Hyperactivity Disorder Randomized Study of Pergolide in Children With Tourette Syndrome Phase II Pilot Controlled Study of Short Vs Longer Term Pimozide (Orap) Therapy in Tourette Syndrome tDCS in Tourette (TIC-TDCS) Anger Control Training for Youth With Tourette Syndrome Safety and Tolerability Study of NBI-98854 for the Treatment of Subjects With Tourette Syndrome Neurofeedback for Tourette Syndrome Brain Stimulation for the Treatment of Tourette Syndrome Study of Tics in Patients With Tourette’s Syndrome and Chronic Motor Tic Disorder Timing of Voluntary Movement in Patients With Tourette Syndrome and Chronic Tic Disorder Repetitive Transcranial Magnetic Stimulation of the Posterior Parietal Cortex in Patients Suffering From Gilles de la Tourette Syndrome Methylphenidate for Treating Children With ADHD and Tourette Syndrome Safety and Tolerability of Once-daily Oral Aripiprazole in Children and Adolescents With Tourette’s Disorder Tourette Syndrome and Seasonality (Stagionalità Tourette) Study Evaluating the Safety and Efficacy of Fixed-dose Once-daily Oral Aripiprazole in Children and Adolescents With Tourette’s Disorder Role of the Sensory Experience in Generating Motor Tics in Tourette Syndrome Effectiveness of Behavior Therapy and Psychosocial Therapy for the Treatment of Tourette Syndrome and Chronic Tic Disorder Proof of Concept Study of an Oral Orthotic to Reduce Tic Severity in Chronic Tic Disorder and Tourette Syndrome Evaluation of Safety and Tolerability of Long-term TEV-50717 (Deutetrabenazine) for Treatment of Tourette Syndrome in Children and Adolescents Multi-site Transcranial Magnetic Stimulation Therapy of the Supplementary Motor Area in Children With Tourette Syndrome Open-Label Safety and Tolerability Study of NBI-98854 for the Treatment of Pediatric Subjects With Tourette Syndrome A Randomized, Placebo-controlled, Tourette Syndrome Study. A Trial of Bilateral Deep Brain Stimulation to the Globus Pallidus Internum in Tourette Syndrome A Study of the Effectiveness and Safety of Tetrabenazine MR in Pediatric Subjects With Tourette’s Syndrome An Open-label Study to Determine the Efficacy and Safety of Topiramate in the Treatment of Tourette Syndrome. Thalamic Deep Brain Stimulation for Tourette Syndrome Exploration of Glutamatergic System With PET Radiotracer in Gilles de la Tourette Patients: Pilot Study (GlutaTour) ABF Tourette’s Disorder Post Marketing Surveillance Study Safety and Efficacy of NBI-98854 in Pediatric Subjects With Tourette Syndrome Brain Activity Associated With Tics in Patients With Tourette Syndrome Safety, Tolerability, and Efficacy of NBI-98854 for the Treatment of Pediatric Subjects With Tourette Syndrome Internet-based Behaviour Therapy for Tourette’s Disorder and Chronic Tic Disorder Pramipexole Pilot Phase II Study in Children and Adolescents With Tourette Disorder According to DSM-IV Criteria Response Inhibition in Tourette Syndrome Alternatives for Reducing Tics in TS: A Study of TEV-50717 (Deutetrabenazine) for the Treatment of Tourette Syndrome in Children and Adolescents. Safety, Pharmacokinetics, and Pharmacodynamics of NBI-98854 in Children and Adolescents With Tourette Syndrome Pallidal Stimulation and Gilles de la Tourette Syndrome Developing New Treatments for Tourette Syndrome: Therapeutic Trials With Modulators of Glutamatergic Neurotransmission Evaluation of the HBDL Coil Transcranial Magnetic Stimulation (TMS) Device – Safety and Feasibility Study for the Treatment of Tourette Syndrome Pilot Study of the Modified Atkins Diet for Tourette Syndrome Trial to Evaluate the Long-term Efficacy of Oral Aripiprazole in the Treatment of Pediatric Subjects With Tourette’s Disorder Efficacy of a Therapeutic Combination of Dronabinol and PEA for Tourette Syndrome Pilot Study for Use of Dysport in Treatment of Vocal Tics in Patients With Tourette’s Syndrome A Study to Examine the Efficacy of a Therapeutic THX-110 for Tourette Syndrome Open Label Trial of Aripiprazole in Children and Adolescents With Tourette’s Disorder Open-label Extension Study of Pramipexole in the Treatment of Children and Adolescents With Tourette Syndrome Study Evaluating The Safety And Efficacy Of PF-03654746 In Adult Subjects With Tourette’s Syndrome Safety & Tolerability Study of Once-weekly Oral Aripiprazole in Children and Adolescents With Tourette’s Disorder Hypersensitivity in Tourette Syndrome Role of Frontal Cortex in the Pathophysiology of Gilles de la Tourette Syndrome (GTS) Efficacy & Safety Study of Once-weekly Oral Aripiprazole in Children and Adolescents With Tourette’s Disorder Efficacy & Safety Study of Once-weekly Oral Aripiprazole in Children and Adolescents With Tourette’s Disorder Safety and Efficacy Study of NBI-98854 in Adults With Tourette Syndrome VoIP Delivered Behavior Therapy for Tourette Syndrome Safety and Efficacy Study of NBI-98854 in Children and Adolescents With Tourette Syndrome Study of ABX-1431 in Adult Patients With Tourette Syndrome or Chronic Motor Tic Disorder Subthalamic Stimulation in Tourette’s Syndrome Study of GABA-A Receptors in the Generation of Tics in Patients With Tourette’s Syndrome Transcranial Magnetic Stimulation (TMS) for Individuals With Tourette’s Syndrome Neural Correlates of Sensory Phenomena in Tourette Syndrome Sensory Symptoms in Tourette Syndrome Tourette Syndrome Deep Brain Stimulation The Safety and Efficacy of Long-term Treatment of PINS Stimulator System for Tourette Syndrome Safety, Tolerability, Pharmacokinetic, and Efficacy Study of AZD5213 in Adolescents With Tourette’s Disorder Aripiprazole Oral Solution in the Treatment of Children and Adolescents With Tourette’s Syndrome Facial Expression Recognition of Emotion and Categorization of Emotional Words in Gilles de la Tourette’s Syndrome Thalamic Deep Brain Stimulation for Tourette Syndrome Rollover Study for Continuing NBI-98854 Administration in Pediatric Subjects With Tourette Syndrome The Effect and Safety of Plum-blossom Needle for Tourette Syndrome Proof-of-Concept Safety Study of CPP-109 (Vigabatrin) for Treatment Refractory Tourette’s Disorder Ecopipam Treatment of Tourette Syndrome High Frequency Stimulation of the GPi or Thalamus in Tourette’s Syndrome Computerized Working Memory Training in Children With ADHD and Comorbid Tourette Syndrome Optimising Anterior Pallidal Deep Brain Stimulation for Tourette’s Syndrome MRI Study of Tic Remission in Tourette Syndrome Thalamic Deep Brain Stimulation for the Treatment of Refractory Tourette Syndrome Selective Microbiota Transplantation for Tourette’s Syndrome Parent Behavioral Training for Disruptive Behaviors in Tourette Syndrome A Pilot Study Of SD-809 (Deutetrabenazine) In Moderate To Severe Tourette Syndrome (TS) Impulsivity in Tourette Syndrome : Behavioral and Neuroimaging Study Developing Cognitive Training for Tourette Syndrome A Trial Evaluating the Efficacy, Safety, and Pharmacokinetics of SNC-102 in Subjects With Tourette Syndrome Safety and Efficacy of Cannabis in Tourette Syndrome Activity in Tourette Syndrome FAAH Inhibitor Trial for Adults With Tourette Syndrome Open-Trial of EPI-743 for Adults With Tourette Syndrome Omega-3 Fatty Acids in Tourette’s Disorder Do Mirror Neurons Play a Role in Tourette Syndrome Physiopathology? A Pilot Study. Apathy in Tourette Syndrome and Changes in Quality of Life Sensory Processing in Tourette Syndrome The Pathophysiology of Tourette Syndrome: a Multimodal Study Behavioral Therapy for Tourette Syndrome Behavioral Therapy for Children and Adolescents With Tourette Syndrome Ecopipam Treatment of Tourette’s Syndrome in Subjects 7-17 Years Transcranial Magnetic Stimulation for Children With Tourette’s Syndrome

Brief Title

Internet-based Cognitive Behavioral Therapy for Chronic Tic Disorder and Tourette's Disorder: a Feasibility Trial

Official Title

Internet-based Cognitive Behavioral Therapy for Chronic Tic Disorder and Tourette's Disorder: a Feasibility Trial

Brief Summary

      Tic disorders, including Tourette's Disorder (TD) and Chronic Motor or Vocal Tic Disorder
      (CTD), are neurodevelopmental motor disorders characterised by motor and/or vocal tics.
      TD/CTD are impairing conditions with onset during childhood that often persist into
      adulthood. Behaviour therapy (BT) is an effective treatment for TD/CTD and is recommended as
      a first-line intervention in both in children and in adults. However, most adults with TD/CTD
      do not have access to BT due to a lack of trained professionals and geographical barriers.
      The objective of the study is to adapt and extend existing face-to-face BT treatment
      protocols for adults with TD/CTD to an internet-delivered format and evaluate its feasibility
      and preliminary efficacy. A total of 30 adult TD/CTD adult patients deemed eligible for the
      study through the recruitment process involving both psychologist and physician assessment
      will be enrolled in the project. The 8-modues treatment program, mainly based on exposure
      with response prevention with addition of other techniques will be made available for the
      participants in a secure treatment platform. The participants will keep in touch with a
      therapist using two-ways written communication in the same platform. The therapist's role
      will be to introduce the treatment and its modules, give feedback on the homework assignments
      and open the new modules as well as monitor the participants psychiatric symptoms and
      activity in the plattform. The measures will include tic severity secifically and disease
      severity in general, anxiety and depression symptoms, quality of life, treatment credibility
      and therapeutic alliance. The measures will be administrated at baseline, min- and
      post-tretment, as well at 3 and 12 months follow-up. Upon completion, this project will be
      the first crucial step towards the implementation of internet-delivered behaviour therapy
      (I-BT) for adults with TD/CTD in regular health care.

Detailed Description


      TS (Tourette Syndrome) is characterized by multiple motor tics and one or more vocal tics
      that have persisted for at least one year since initial onset, whereas in Chronic Motor or
      Vocal Tic Disorder (CTD) either motor or vocal tics are present, but not both, during at
      least one year (1). It is a childhood-onset disorder that affects more boys than girls (4:1
      ratio) with a prevalence of about 1% in children (2), of which a substantial proportion
      continue to experience impairing tics into adulthood (3,4,5). TS/CTD are associated with
      reduced quality of life (6), lower educational attainment (7), and increased risk for
      cardiovascular and metabolic disorders (8). Notably, individuals with TD/CTD have a four-fold
      increased risk of death by suicide and the risk is highest for those whose tics persist into
      adulthood (9). Thus, effective interventions and appropriate follow-up are crucial to prevent
      undesirable health consequences and societal costs.

      Evidence-based treatments for Tourette's Disorder and Chronic Tic Disorder

      Historically, the most common treatment for TS/CTD has been pharmacotherapy, specifically
      antipsychotics. However, pharmacological treatments are modestly efficacious in reducing tics
      and often have undesirable side effects such as tiredness or long-term metabolic problems
      (10). Non-drug treatments for TS/CTD are therefore attractive alternatives. Behavioural
      treatments acknowledge that tics have a biological origin but that their expression is
      influenced by contextual variables: feelings, sensations, situations or other triggers that
      occur before tics. CBT focuses on modifying environmental factors that influence tic severity
      and teaches patients specific skills they can use to better manage their tics (11). CBT for
      tics generally includes two main elements. First, the patient learns how to detect their tics
      on a daily basis. Secondly, the patient learns how to resist the tics. CBT for TS/CTD has
      shown to be effective against waiting list (12) and against an active control group (13-16),
      with sustained results up to one year after treatment completion (17, 18). Expert guidelines
      in Europe and elsewhere recommend CBT as the first-line treatment for TS/CTD (17, 18).

      Preferred treatments are not available

      Surveys among young people with tics and their parents indicate that cognitive behavioural
      therapy is their preferred treatment option (19). However, this intervention is not widely
      available for TS/CTD (20). Thus, despite patient preferences and the problematic side effects
      of drugs, the vast majority of TS/CTD patients in Sweden receive only medication to treat
      their tics. Members of our team conducted an epidemiological study looking at all patients
      diagnosed with TS or CTD (n=6,979) in Sweden and found that over 75% of them received at
      least one drug, and over 70% were on at least two types of drugs. Moreover, prescription of
      anxiolytics, hypnotics/sedatives, ADHD drugs, and atypical antipsychotics increased over the
      8-year study period (21).

      In sum, expert therapists trained to treat TS/CTD with CBT in Sweden are lacking. Even in
      Stockholm County, it is our clinical experience that many adult patients with TS/CTD have
      trouble finding the appropriate expertise when seeking treatment in primary care, neurology,
      or psychiatry.

      A remote cognitive behavioural intervention for adults with Tourette Syndrome

      There has been an increase in uptake of information and communication technology within
      health care in recent years. One such innovation is to provide the treatment online instead
      of face-to-face. In internet-delivered psychological treatments, the treatment is provided in
      the form of self-help texts, homework assignments, and worksheets for the patient to fill in
      online. An identified therapist provides support and guidance throughout treatment via a
      built-in messaging system. Internet-delivered treatments is a burgeoning research field where
      Sweden is at the forefront of international development (22). Internet-delivered treatments
      have been developed and evaluated by our research team for many psychiatric conditions,
      including disorders related to TS/CTD, such as obsessive-compulsive disorder (OCD) and body
      dysmorphic disorder (BDD) (23-26). Internet-delivered treatments have consistently shown
      comparable effects to traditional face-to-face therapies (27) while requiring less therapist
      time per patient and being delivered remotely, thus being cost-effective for health care and
      accessible to patients (28). Preliminary results suggest that videoconferencing (29) and
      I-CBT (30) are feasible options for children with TS/CTD, but there are no such treatments
      available to adults with TS/CTD.

      Research questions

      There is an urgent need to disseminate evidence-based treatments for adults with TS and CTD.
      Internet-delivered cognitive behavioural therapy (ICBT) for TD/CTD will be a feasible,
      acceptable, and safe method to deliver evidence-based treatment for adults with TS/CTD. We
      also hypothesize that I-CBT will show preliminary efficacy in reducing tic severity in this


      Study design

      The aim of the project will be to carry out a pilot trial to evaluate the feasibility,
      acceptability, safety, and efficacy of the internet-delivered treatment for TS/CTD. We also
      aim to further refine the treatment based on feedback from participants and therapists
      involved in the trial. Furthermore, information obtained from this feasibility trial will
      allow us to investigate key design and methodological issues to inform the protocol of a
      subsequent full scale randomised controlled trial. Specifically, the generated within
      participant data will be critical to perform a power analysis for a more definitive trial
      (see power analysis section).

      The study design and outcomes will be registered online at prior to
      inclusion of the first participant. We will also upload the scripts used for statistical
      analyses to an online repository (such as the Open Science Framework or Github).

      Outcome measures

      Feasibility measures: Feasibility will be assessed according to the RE-AIM framework (reach,
      effectiveness, adoption, implementation, maintenance) (33). Reach will be measured by looking
      at the percentage eligible/excluded, reasons for refusal or exclusion.

      Efficacy measures: Unless specified otherwise, all outcome measures will be administered at
      baseline, post-treatment (primary end-point), 3-month follow-up, 6-month follow-up, and
      12-month follow-up. Primary outcome measure: YGTSS TTSS. Secondary disorder-specific
      outcomes: YGTSS Impairment scale, Adult Tic Questionnaire (weekly). Functioning and quality
      of life measures: The Clinical Global Impression - Severity (CGI-S) and Clinical Global
      Impression - Improvement (CGI-I) Scales will be used to assess overall clinical severity and
      consequent treatment response (scores of "very much improved" (1) or "much improved" (2) will
      define treatment response according to previous trials in tic disorders (14, 16). In
      addition, Global Assessment of Functioning (GAF), Sheehan Disability Scale (SDS), EuroQol
      5-dimensions (EQ-5D), Gilles de la Tourette Syndrome Quality of Life Scale (QTS-QoL) will be
      used to evaluate functioning and quality of life. Depressive symptoms: MADRS-S will be
      administered weekly to follow depressive symptoms during treatment.


      Patients with TS/CTD will be recruited through our clinic (OCD-programmet) as well as through
      self-referral. Information about the study will be communicated to patient associations (such
      as OCD-förbundet and Attention), health centers, psychiatric outpatient clinics, internal
      referral systems (remissportal) as well as advertised in the media and in social media.
      Self-referral will be made available through an internet website constructed for the study.
      The website will contain information about the study, the research group, and contact
      information. Screening: Self-referred participants will go through a telephone screening
      containing information about the study and an assessment of inclusion and exclusion criteria.
      If the presumptive participant is deemed fit for inclusion, they will be scheduled for a
      visit with a study clinician. Patients that are recruited through internal referral systems
      will not go through the screening procedure but will be scheduled for a visit with a study
      clinician. Assessment: Potential participants will be assessed face to face at our clinic in
      Stockholm for eligibility to participate (see inclusion and exclusion criteria above) by a
      study clinician. The assessment includes an assessment if the participant fulfil the
      diagnostic criteria of a TS/CTD diagnosis based on a review of medical history and the DSM-5
      diagnostic criteria. The YGTSS will be administered to establish symptom severity. A
      semi-structured clinical psychiatric interview (the Mini-International Neuropsychiatric
      Interview; MINI), as well as the SCID-1 section for OCD and related disorders (OCD, BDD,
      tricho- and dermatillomania, hoarding disorder) will be administered in order to assess
      psychiatric comorbidities. This routine corresponds to the regular diagnostic assessment at
      the clinic. Patients suitable for study participation will be given information about the
      study and asked to sign a form giving their informed consent to participate in the study.
      Participants will initiate treatment within a week and begin by filling in self-report
      measures on the internet (listed under Efficacy measures, above). Patients who decline
      participation in the study will be offered regular treatment at the clinic or, depending on
      the individual's needs, be referred to other clinical services.


      Interventions: As described above, the treatment protocol will be adapted from existing
      validated protocols for face-to-face treatment and remote delivery (12-16, 30).

      The treatment will be provided through a secure internet platform designed for
      internet-administered treatments (BASS-4). The platform has been studied extensively and is
      currently a part of the Swedish public health care services. In the treatment, the patient
      works through modules of self-help material, each ending in a short quiz with questions about
      the material. The treatment is supported by a therapist through text-based communication via
      the platform as well as occasional phone calls when needed. The central component in the
      treatment is exposure and response prevention (ERP). In ERP, the patient exposes her/himself
      to situations that trigger premonitory urges (a type of bodily sensation that precede the
      tic) while practicing to resist the tic. By doing this systematically and repeatedly, the
      patient gradually learns how to tolerate the premonitory urges and increase the ability to
      control and resist doing tics. Beyond ERP the treatment consists of other components such as
      applied relaxation, counter-movements and interventions to decrease stressors in the
      patient's everyday life.

      Therapist training, supervision, and quality control

      Therapists will be licensed clinical psychologists, psychologists in training or fifth-year
      clinical psychology students under supervision. As all communication with the patients is
      stored in the platform, continuous monitoring and supervision is possible and will be
      provided by the study coordinator to ensure adherence. All assessors will be trained on the
      use of the primary outcome measure, the YGTSS (32) using case examples, and inter-rater
      reliability scores will be obtained. The study is approves by the Ethical Review Authority.
      The trial will be conducted in accordance with Good Clinical Practice (GCP) and results will
      be reported in accordance with the CONSORT statement for non-pharmacological trials.

      Statistical analysis

      Power calculation

      Given a standardized (Cohen's d) within-group effect size of 0.5 to 1 in previous research of
      remote therapy for TS/CTD (30), we aim to recruit 30 participants in order to be able to
      detect an effect size of d = 0.7, allowing for a 20% dropout (90% power, alpha 0.05). The
      primary outcome analysis will also inform the power analyses of a future large-scale
      randomised controlled trial via the variance of intercept, fixed effects, random effects, and
      residual variance for the YGTSS in the mixed effects model. These estimates will help us
      select the appropriate number of participants to make the results from the randomised
      controlled trial informative and useful.

      Outcome analyses

      The primary and secondary outcome measures will be evaluated using mixed-effects linear
      regression models with a fixed effect of time, as well as random intercept and random slope
      specifications for each individual. Within-group effect sizes will be calculated using
      Cohen's d by dividing the mean change between the time-points by the pooled standard
      deviation of that measure at pre-treatment. To maximize replicability and transparency, all
      statistical code will be published in public repositories.

Study Type


Primary Outcome

Yale Global Tic Severity Scale (YGTSS)

Secondary Outcome

 Yale Global Tic Severity Scale (YGTSS) - impairment scale


Chronic Tic Disorder


Internet-delivered Cognitive Behavior Therapy for Chronic Tic Dosorder/Tourette Disorder


* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.

Recruitment Information

Recruitment Status


Estimated Enrollment


Start Date

April 15, 2021

Completion Date

December 21, 2022

Primary Completion Date

December 31, 2021

Eligibility Criteria

        Inclusion Criteria:

        The participant should

          1. be 18 years of age or older,

          2. fulfill diagnostic criteria for Tourette's Disorder (from now on referred to as
             Tourette Syndrome; TS) or Persistent (Chronic) Motor or Vocal Tic Disorder (CTD)
             according to the DSM-5 diagnostic criteria,

          3. have Total Tic Severity Score [TTSS] of >15, or >10 for individuals with motor or
             vocal tics only, in the past week as measured by the Yale Global Tic Severity Scale
             (YGTSS) (31) ,

          4. be able to read and communicate in Swedish and

          5. have regular access to a computer connected to the internet, sufficient technical
             skills to use the treatment platform, as well as a mobile phone to receive SMS.

        Exclusion Criteria:

          1. organic brain disorders, intellectual disability, psychosis, bipolar disorder, autism
             spectrum disorder, anorexia nervosa, or substance use disorders,

          2. acute psychiatric problems such as severe depression or suicidal risk needing
             immediate psychiatric care,

          3. severe tics causing immediate risk to the patients or others and requiring urgent
             medical attention,

          4. previous CBT for tics of a minimum of 8 sessions with a qualified therapist within 12
             months prior to assessment,

          5. simultaneous psychological treatment for TS or CTD

          6. initiation or adjustment of medication for tics within the last two months prior to




18 Years - N/A

Accepts Healthy Volunteers



, 0704843392, [email protected]

Location Countries


Location Countries


Administrative Informations



Organization ID


Responsible Party

Principal Investigator

Study Sponsor

Karolinska Institutet


 Region Stockholm

Study Sponsor

, , 

Verification Date

May 2021