Autistic DisorderNCT00464477
Advanced Grandparental Age as a Risk Factor for Autism
An observational study of Autistic Disorder and Pervasive Developmental Disorder, run by University of Mississippi Medical Center at 1 site in United States.
Trial 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… Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Autistic Disorder, Pervasive Developmental Disorder, Asperger Syndrome
- How many people
- 100 participants
- Where
- 1 siteUnited States
- Study dates
- Jun 2007to Oct 2007
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Study population: Patients with any pervasive developmental disorder.
Who may be able to join
- Individuals of any age with autism, autistic disorder, autistic spectrum disorder, Asperger syndrome, pervasive developmental disorder, PDD-NOS, Rett syndrome, or Childhood disintegrative disorder
Who cannot join
None listed.
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Mississippi Medical Center
Jackson, Mississippi, 39216
About this study
Official title: Advanced Grandparental Age as a Risk Factor for Autism and Other Pervasive Developmental Disorders
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.
Read the 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.
- Conditions
- Autistic Disorder, Pervasive Developmental Disorder, Asperger Syndrome, Childhood Disintegrative Disorder, Rett Syndrome
- Keywords
- Autism, Autistic disorder, Pervasive developmental disorder, Asperger syndrome, Childhood disintegrative disorder, Rett syndrome
- Medical subject headings
- Autistic Disorder, Child Development Disorders, Pervasive, Asperger Syndrome, Rett Syndrome
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Apr 2007 (estimated)
- Study startJun 2007
- Study completionOct 2007
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Autistic DisorderStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case only
- Time perspective
- Retrospective
- Enrolment
- 100 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Mississippi Medical Center
- Sponsor type
- University, hospital or other
- Investigators
- Omar Abdul-Rahman, MD, Principal investigator, University of Mississippi Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00464477
- Sponsor's protocol ID
- 2007-0023
- Status last verified
- Nov 2007
- First submitted
- 20 Apr 2007
- Last updated
- 7 Nov 2007
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 7 Nov 2007. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Advanced Grandparental Age as a Risk Factor for Autism and Other Pervasive Developmental Disorders
- ClinicalTrials.gov ID
- NCT00464477
- Acronym / sponsor ID
- 2007-0023
- Conditions
- Autistic Disorder, Pervasive Developmental Disorder, Asperger Syndrome, Childhood Disintegrative Disorder, Rett Syndrome
- Keywords
- Autism, Autistic disorder, Pervasive developmental disorder, Asperger syndrome, Childhood disintegrative disorder, Rett syndrome
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 100 participants (actual)
- Lead sponsor
- University of Mississippi Medical CenterUniversity, hospital or other
- Study start
- Jun 2007
- Study completion
- Oct 2007 (actual)
- First posted
- 23 Apr 2007 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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 design
- Observational model
- Case only
- Time perspective
- Retrospective
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Patients with any pervasive developmental disorder.
Key inclusion criteria (1 listed)
- Individuals of any age with autism, autistic disorder, autistic spectrum disorder, Asperger syndrome, pervasive developmental disorder, PDD-NOS, Rett syndrome, or Childhood disintegrative disorder
Key exclusion criteria (0 listed)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Nov 2007.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Omar Abdul-Rahman, MD principal investigator
University of Mississippi Medical Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Autistic Disorder and Pervasive Developmental Disorder, run by University of Mississippi Medical Center at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 0 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 7 Nov 2007. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Nov 2007.