Administrative Prevalence of Autism in the Texas School System

Sturmey, Peter; James, Vernon

doi:10.1097/00004583-200106000-00005

Cited by 13 publications

(8 citation statements)

References 2 publications

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“…Figure 1 shows a comparison of reported prevalence rates across surveys from the U.K. and U.S., using the mid-point year of birth as the basis for comparing survey populations. This comparison demonstrates that reported autism rates in the U.K. rose from Ͻ10 per 10,000 19,35,42,83,89 to the 17 to 31 per 10,000 range 61,78 over 40 years and that reported PDD rates rose to approximately 60 per 10,000 in the same period. 61,78,95 According to the reported confidence intervals (CIs), these changes are statistically significant.…”

Section: Critical Examination Of Methods For Cross-survey Comparisonsmentioning

confidence: 70%

“…Arguing against this hypothesis is the observation that surveys of large populations in the U.S. and the U.K. have yielded ASD and autism rates consistently greater than 10 per 10,000 and have also reported upward trends during their survey periods. 2,63,73,83 The same review also suggests that close coordination with a "routine developmental check" in preschool children can explain high levels of case identification, pointing for support to several Japanese surveys that have found prevalence rates greater than 10 per 10,000. 51,52,55,66 Arguing against this suggestion are numerous earlier Japanese surveys that reported lower autism rates, [37][38][39][40]43,47 given no evidence of changing practices in Japan.…”

Section: Case Finding: Population Restrictions Case Identification mentioning

confidence: 84%

“…In the United States, special education benefits are administered at the state level, so several recent administrative surveys have been undertaken at the state level. 2,73,83,84 In the United Kingdom, health care services databases have provided the case identification for similar administrative surveys. 20,63,68 When researchers rely on service providers rather than a central database to identify potential cases, cases may be missed through non-cooperation at many stages.…”

Section: Case Finding: Population Restrictions Case Identification mentioning

confidence: 99%

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What's Going on? The Question of Time Trends in Autism

Blaxill¹

2004

Public Health Rep

155

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Increases in the reported prevalence of autism and autistic spectrum disorders in recent years have fueled concern over possible environmental causes. The author reviews the available survey literature and finds evidence of large increases in prevalence in both the United States and the United Kingdom that cannot be explained by changes in diagnostic criteria or improvements in case ascertainment. Incomplete ascertainment of autism cases in young child populations is the largest source of predictable bias in prevalence surveys; however, this bias has, if anything, worked against the detection of an upward trend in recent surveys. Comparison of autism rates by year of birth for specific geographies provides the strongest basis for trend assessment. Such comparisons show large recent increases in rates of autism and autistic spectrum disorders in both the U.S. and the U.K. Reported rates of autism in the United States increased from <3 per 10,000 children in the 1970s to >30 per 10,000 children in the 1990s, a 10-fold increase. In the United Kingdom, autism rates rose from <10 per 10,000 in the 1980s to roughly 30 per 10,000 in the 1990s. Reported rates for the full spectrum of autistic disorders rose from the 5 to 10 per 10,000 range to the 50 to 80 per 10,000 range in the two countries. A precautionary approach suggests that the rising incidence of autism should be a matter of urgent public concern.

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Section: Critical Examination Of Methods For Cross-survey Comparisonsmentioning

confidence: 70%

Section: Case Finding: Population Restrictions Case Identification mentioning

confidence: 84%

Section: Case Finding: Population Restrictions Case Identification mentioning

confidence: 99%

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What's Going on? The Question of Time Trends in Autism

Blaxill¹

2004

Public Health Rep

155

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“…Our multiple regression model identified age as the variable that best predicted autism (See also Table 1). Other research has reported trends to diagnosing autism spectrum disorders in children and adolescents more frequently than in adults (Fombonee, 1999;Sturmey & James, 2001. ) There is evidence that certain autism-related behaviours are more likely to improve in older patients, as compared to younger patients (Seltzer, Krauss, Shattuck, Orsmond, Swe & Lord, 2003).…”

Section: Discussionmentioning

confidence: 98%

Psychopathology in Adults with Autism and Intellectual Disability

Tsakanikos

Costello

Holt

et al. 2006

J Autism Dev Disord

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There have been few studies of psychopathology in adult with autism. This study examined psychiatric co-morbidity in 147 adults with intellectual disability (ID) and autism and 605 adults with ID but without autism. After controlling for the effects of gender, age, psychotropic medication and level of ID, people with autism and ID were no more likely to receive a psychiatric diagnosis than people with ID only. People with autism were less likely to receive a diagnosis of personality disorder. These findings cast doubts on the hypothesis that adults with ID and autism are more vulnerable to certain psychiatric disorders than non-autistic adults with ID.

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“…To illustrate this, Table 2 summarises the findings of eight recent surveys conducted in the UK 3-7 and the USA. 5,[8][9][10] These investigations were conducted in the same two countries, at the same time, in similar age groups, and therefore prevalence estimates should be comparable. Nevertheless, there is a 6-fold variation within UK rates and a 14-fold variation within USA rates, which clearly illustrate the impact of method factors on estimates.…”

mentioning

confidence: 99%