Assessment of Children With Tic Onset in the Past 6 Months

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Brief Title

Assessment of Children With Tic Onset in the Past 6 Months

Official Title

Predictive Biomarkers of Conversion to Tourette Syndrome in Children With New-Onset Tics

Brief Summary

      The purpose of this research is to study why most children who have tics never develop
      Tourette syndrome but some do. In other words, we aim to find features that may predict whose
      tics will go away and whose tics will continue or worsen, in children ages 5 through 10 years
      whose first tic occurred within the past 9 months.
    

Detailed Description

      Up to 30% of all children will have a tic at some point. However, tics that last a whole year
      (or more) occur in only 3% of the population. Thus tic persistence may be more unusual than
      tic onset, yet almost no data exist on which people with recent-onset tics go on to be
      diagnosable with Tourette syndrome or chronic tic disorder, versus those whose tics are only
      transient.

      The overall goal of this research is to identify, prospectively, what imaging, clinical or
      neuropsychological features of children who just recently started ticcing will go on to
      develop a chronic tic disorder (including Tourette syndrome). Hypotheses are derived
      primarily from studies of patients with established tic disorders.

      Aim 1. Study pathophysiology of recent-onset tics. Aim 1a. Identify clinical,
      neuropsychological, and brain imaging features that differentiate children with recent tic
      onset ("New Tics" group) from tic-free controls. We will test a priori hypotheses including
      tic suppression, inattentiveness, caudate nucleus volume, tic severity, and premonitory urges
      (see "Summary of hypotheses" on the 3rd page of Research Strategy). Secondary analyses will
      apply support vector machine (SVM) learning to a rich set of data to discover novel,
      multivariate differences in the New Tics group [3,45]. These data will also include tic
      phenomenology, psychiatric diagnosis, habit learning, motor dexterity, structural MRI,
      perfusion MRI, and resting state functional connectivity fMRI (rs-fcMRI).

      Aim 1b. Compare New Tics subjects to a group of children who are matched for age but have
      already had tics for ≥1 year ("Existing TS/CTD"). Since both groups have tics, this
      comparison will highlight abnormalities that cannot be explained by the mere current presence
      of tics, including markers of chronicity or adaptation.

      Aim 2. Prospective study of tic remission. We will re-evaluate New Tics subjects at the
      1-year anniversary of tic onset (the accepted duration criterion for diagnosis of TS/CTD).
      Our pilot data show good variability in the change in tic symptom severity (i.e., change in
      YGTSS total tic score from baseline to followup: ΔTTS), so ΔTTS will be the primary dependent
      variable. We focus on outcome as a continuous variable because no reliable estimate exists
      for how many New Tics subjects will remit versus go on to diagnosis with TS/CTD. Remission
      rate also depends on definition and on the thoroughness of the follow-up evaluation [4].

      Aim 2a. Study the physiology of tic remission by identifying changes in clinical,
      neuropsychological, and brain imaging variables that correlate with changes in clinical tic
      severity (ΔTTS). This Aim benefits from prospective observation and within-subject
      comparisons. The primary analysis will focus on any markers identified in Aim 1. A secondary
      analysis will apply machine learning methods for a data-driven approach (support vector
      regression: SVR).

      Aim 2b. Identify predictors of improvement or worsening, i.e. clinical, neuropsychological,
      and brain imaging features at study entry that correlate significantly with ΔTTS. The 2
      primary analyses will relate clinical outcome (ΔTTS) to tic suppression ability and caudate
      volume at study entry. Secondary analyses will examine other predictors using an SVR machine
      learning approach.
    


Study Type

Observational


Primary Outcome

DSM-5 diagnosis of a chronic tic disorder at 12 months


Condition

Tourette Syndrome


Study Arms / Comparison Groups

 Recent-onset tics that will persist
Description:  Children between 5 to 10 years of age with recent-onset tics (first tic occurred within the past 9 months) who, when reassessed at 1 year after the first tic began (i.e. 6-12 months after study enrollment) will turn out to meet criteria for a chronic tic disorder (including Tourette syndrome). Scheduled follow-up visits will include children over age 10 (initially enrolled at age 5-10).

Publications

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

Recruitment Information



Estimated Enrollment

100

Start Date

August 2010

Completion Date

May 31, 2022

Primary Completion Date

May 31, 2022

Eligibility Criteria

        ** All subjects **

        Inclusion Criteria:

          -  Age 5-10

          -  Informed consent from a parent and assent from the child.

               -  New Tics Group **

        Inclusion Criteria:

          -  tics now, but developed them only in the past 9 months.

        Exclusion criteria: secondary tics, another neurological disorder (not counting migraine),
        structural brain disease, severe systemic illness, nonproficiency in the English language,
        and psychiatric illness including mental retardation, autism, substance dependence, current
        substance abuse, primary psychotic illness, bipolar disorder and current major depression.
        Psychoactive medications are allowed if their dose has not changed in the past month.

        ** Existing TS/CTD control group **

        Inclusion criteria:

          -  children who meet DSM-5 criteria for Tourette's Disorder or Persistent Tic Disorder at
             enrollment

          -  matched to children from the New Tics group on age (within 1 year), sex, handedness,
             and ADHD status.

        Exclusion criteria: same as for the New Tics group.

        ** Tic-free controls **

        Inclusion criteria: tic-free children matched to children from the New Tics group on age
        (within 1 year), sex, handedness, and ADHD status.

        Exclusion criteria: current or past tic disorder in the subject or a first-degree relative,
        plus the exclusions listed for the New Tics group.
      

Gender

All

Ages

5 Years - 10 Years

Accepts Healthy Volunteers

No

Contacts

Kevin J. Black, MD, , 

Location Countries

United States

Location Countries

United States

Administrative Informations


NCT ID

NCT01177774

Organization ID

09-1700

Secondary IDs

K24MH087913

Responsible Party

Principal Investigator

Study Sponsor

Washington University School of Medicine

Collaborators

 National Institute of Mental Health (NIMH)

Study Sponsor

Kevin J. Black, MD, Principal Investigator, Washington University School of Medicine


Verification Date

May 2020