Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Mayo Clinic study suggests no link between autism and immunizations

04.01.2005


Over the past 20 years, there has been speculation about a connection between immunizations and an increase in autism. However, a study by Mayo Clinic researchers published in the January issue of Archives of Pediatrics and Adolescent Medicine suggests the increase may be due to improved awareness, changes in diagnostic criteria and availability of services, not environmental factors or immunizations.

"This study is the first to measure the incidence -- the occurrence of new cases -- of autism by applying consistent, contemporary criteria for autism to a specific population over a long period of time," says William Barbaresi, M.D., a Mayo Clinic developmental pediatrician and one of the study authors. "In doing so, the study accounts for improvements in the diagnostic criteria for autism, the medical community’s improved understanding of this disease and changes in federal special education laws."

The study found that the increase in the incidence of autism in Olmsted County, Minn. coincided with broadening of the diagnostic criteria for autism and new federal special education laws including autism as a disability category. Both events occurred many years after immunizations were mandated for school entry. Broader, more precise diagnostic criteria for autism were introduced in 1987. Prior to these new criteria, children with autism may have been given less precise diagnoses such as "developmental delay" or "mental retardation," and children with milder symptoms of autism may not have been identified at all. The 1991 federal special education laws improved the availability of educational services for children with autism.



The study used data from the Rochester Epidemiology Project, a database of all inpatient and outpatient records in Olmsted County, Minn. The database diagnoses are indexed for computerized retrieval, allowing researchers to identify subjects with any developmental disorder. Researchers found 3,000 children with at least one of 80 diagnoses related to autism. Of the 3,000 children, 124 actually met the current diagnostic criteria for autism. Reviewing the medical and school history of this group showed that the incidence of autism was stable until 1988-1991, then increased after new laws and new diagnostic criteria were implemented.

Other authors of the report in the January issue of Archives of Pediatrics and Adolescent Medicine are: Slavica Katusic, M.D., Robert Colligan, Ph.D., Amy Weaver, M.S., and Steven Jacobsen, M.D., Ph.D. The full article is available by contacting Archives of Pediatrics and Adolescent Medicine at 312-464-5262. It is also available at http://pubs.ama-assn.org/media/.

Lee Aase | EurekAlert!
Further information:
http://pubs.ama-assn.org/media/
http://www.mayoclinic.org/news

More articles from Health and Medicine:

nachricht Team discovers how bacteria exploit a chink in the body's armor
20.01.2017 | University of Illinois at Urbana-Champaign

nachricht Rabies viruses reveal wiring in transparent brains
19.01.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>