Working…
COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC: https://www.coronavirus.gov.

Get the latest research information from NIH: https://www.nih.gov/coronavirus.
ClinicalTrials.gov
ClinicalTrials.gov Menu

Advanced Grandparental Age as a Risk Factor for Autism

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT00464477
Recruitment Status : Completed
First Posted : April 23, 2007
Last Update Posted : November 7, 2007
Sponsor:
Information provided by:
University of Mississippi Medical Center

Tracking Information
First Submitted Date April 20, 2007
First Posted Date April 23, 2007
Last Update Posted Date November 7, 2007
Study Start Date June 2007
Primary Completion Date Not Provided
Current Primary Outcome Measures Not Provided
Original Primary Outcome Measures Not Provided
Change History
Current Secondary Outcome Measures Not Provided
Original Secondary Outcome Measures Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
 
Descriptive Information
Brief Title Advanced Grandparental Age as a Risk Factor for Autism
Official Title Advanced Grandparental Age as a Risk Factor for Autism and Other Pervasive Developmental Disorders
Brief Summary

The Division of Medical Genetics at the University of Mississippi Medical Center is recruiting parents of children with a pervasive developmental disorder (including autism, autistic spectrum disorder, PDD-NOS, Asperger syndrome, childhood disintegrative disorder, and Rett syndrome) to participate in a study to help determine potential causes of the increasing prevalence of these disorders. The study is being conducted using an anonymous on-line survey available to parents through a secure link.

The study consists of approximately 90 questions about the affected child, siblings, parents, and grandparents, which will take roughly 10-15 minutes to complete. Several families will also be invited to participate in a phone interview. Both the survey and the phone interview are conducted using a self-designated code to protect anonymity and patient privacy. No identifying information such as name, date of birth, address, or phone number will be asked. Only questions regarding the year of birth of family members will be asked.

Detailed Description Autism is a genetically heterogeneous entity. Although numerous studies have demonstrated a strong genetic basis, no clear etiology has been identified to date. Recently, two studies have demonstrated an increased risk of autism in children born to fathers over the age of 40. However, given the large male-to-female predominance of autism, it is likely that new mutations on the X chromosome account for a significant number of affected cases. Due to the maternal origin of the X chromosome in males, we hypothesize that advanced maternal-grandpaternal age may also be a risk factor for autism. Precedence for this theory exists with other X-linked disorders such as Duchenne muscular dystrophy and Rett syndrome. Additionally, it has been demonstrated that maternal psychiatric illness, but not paternal psychiatric illness, is more prevalent among parents of children with autism. Using anonymous surveys of families with autistic children, we seek to identify the ages of grandparents at the time the parents were born in order to determine if advanced maternal-grandpaternal age is associated with an increased risk for autism when adjusted for advanced maternal and paternal age. Additionally, we will seek out sister-pairs in order to identify any statistical significance between the ages of the maternal grandfather at delivery of each sister. If advanced maternal-grandpaternal age is, in fact, a risk factor, it would help direct molecular researchers towards genes on the X chromosome as potential etiologies for autism. Also, further study of potential mutagenic exposures in the environment of grandparents may help elucidate the reason for the increasing incidence of autism in recent decades.
Study Type Observational
Study Design Observational Model: Case-Only
Time Perspective: Retrospective
Target Follow-Up Duration Not Provided
Biospecimen Not Provided
Sampling Method Non-Probability Sample
Study Population Patients with any pervasive developmental disorder.
Condition
  • Autistic Disorder
  • Pervasive Developmental Disorder
  • Asperger Syndrome
  • Childhood Disintegrative Disorder
  • Rett Syndrome
Intervention Not Provided
Study Groups/Cohorts Not Provided
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruitment Information
Recruitment Status Completed
Actual Enrollment
 (submitted: June¬†18,¬†2007)
100
Original Enrollment Not Provided
Actual Study Completion Date October 2007
Primary Completion Date Not Provided
Eligibility Criteria

Inclusion Criteria:

  • Individuals of any age with autism, autistic disorder, autistic spectrum disorder, Asperger syndrome, pervasive developmental disorder, PDD-NOS, Rett syndrome, or Childhood disintegrative disorder
Sex/Gender
Sexes Eligible for Study: All
Ages Child, Adult, Older Adult
Accepts Healthy Volunteers No
Contacts Contact information is only displayed when the study is recruiting subjects
Listed Location Countries United States
Removed Location Countries  
 
Administrative Information
NCT Number NCT00464477
Other Study ID Numbers 2007-0023
Has Data Monitoring Committee No
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement Not Provided
Responsible Party Not Provided
Study Sponsor University of Mississippi Medical Center
Collaborators Not Provided
Investigators
Principal Investigator: Omar Abdul-Rahman, MD University of Mississippi Medical Center
PRS Account University of Mississippi Medical Center
Verification Date November 2007