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Rise in New Jersey autism prevalence documented in new study

Date:
December 17, 2012
Source:
University of Medicine and Dentistry of New Jersey (UMDNJ)
Summary:
In a study of 58 communities in four New Jersey counties, autism spectrum disorder (ASD) prevalence is found to have risen from 10.6 per thousand in 2002, to 17.4 per thousand in 2006.

Newly published research led by Walter Zahorodny, PhD, of the University of Medicine and Dentistry of New Jersey (UMDNJ), shows that over a four year period in the past decade, the documented prevalence of autism spectrum disorder (ASD) rose substantially in a sampling of four New Jersey counties. The new study uses 2006 data compiled in 58 communities across Essex, Hudson, Ocean and Union Counties, and shows a prevalence during that year of 17.4 children per one thousand. That compares to a prevalence in 2002 of 10.6 per thousand in those same communities, which had been found in an earlier study.

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The new research, which mirrored the methods of the previous study in order to make as accurate a comparison as possible of the two years, has been published online in the journal Autism.

The study finds that ASD prevalence rose over the four year period both for boys (from 17.0 to 28.7 per thousand) and for girls (from 4.1 to 5.9 per thousand). ASD prevalence also varied by ethnicity, with white non-Hispanic children showing the highest levels of ASD, 20.4 per thousand in 2006 compared with 15.0 per thousand for black, non-Hispanic; 14.7 per thousand for Hispanic; and 14.0 per thousand among Asian children.

Zahorodny, who is an assistant professor of pediatrics and psychiatry at UMDNJ-New Jersey Medical School, says the rises in ASD prevalence that the new study documents fall in line with those measured when similar methodology has been applied in other states. That, in turn, indicates that children in New Jersey do not appear more at risk for ASD than others, as some had earlier feared. "New Jersey has long been a leading indicator of general ASD prevalence, because our state was out front early in its ability to recognize and symptoms in schools and health care settings," says Zahorodny. "As diagnostic skills become more sophisticated in other states, we are finding that they, too, are seeing higher numbers."

They are numbers that exceed experts' earlier expectations. "In various parts of the United States, overall ASD prevalence is approaching two percent," Zahorodny says. "In the past, scientists predicted the prevalence rates would ultimately level off around one percent." Zahorodny says further research is needed to determine what factors have contributed to rises in documented cases of ASD, and also whether documented ASD prevalence will now plateau at approximately two percent or continue to rise when later years are thoroughly analyzed.

About UMDNJ: The University of Medicine and Dentistry of New Jersey (UMDNJ) is New Jersey's only health sciences university with more than 6,000 students on five campuses attending three medical schools, the State's only dental school, a graduate school of biomedical sciences, a school of health related professions, a school of nursing and New Jersey's only school of public health. UMDNJ operates University Hospital, a Level I Trauma Center in Newark, and University Behavioral HealthCare, which provides a continuum of healthcare services with multiple locations throughout the State.


Story Source:

The above story is based on materials provided by University of Medicine and Dentistry of New Jersey (UMDNJ). Note: Materials may be edited for content and length.


Journal Reference:

  1. W. Zahorodny, J. Shenouda, S. Howell, N. Scotto Rosato, B. Peng, U. Mehta. Increasing autism prevalence in metropolitan New Jersey. Autism, 2012; DOI: 10.1177/1362361312463977

Cite This Page:

University of Medicine and Dentistry of New Jersey (UMDNJ). "Rise in New Jersey autism prevalence documented in new study." ScienceDaily. ScienceDaily, 17 December 2012. <www.sciencedaily.com/releases/2012/12/121217152545.htm>.
University of Medicine and Dentistry of New Jersey (UMDNJ). (2012, December 17). Rise in New Jersey autism prevalence documented in new study. ScienceDaily. Retrieved January 26, 2015 from www.sciencedaily.com/releases/2012/12/121217152545.htm
University of Medicine and Dentistry of New Jersey (UMDNJ). "Rise in New Jersey autism prevalence documented in new study." ScienceDaily. www.sciencedaily.com/releases/2012/12/121217152545.htm (accessed January 26, 2015).

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