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The Epidemiology of Autism Spectrum Disorders
Article by Newschaffer et al
43
Psychology
Graduate
02/23/2015

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Term
Epidemiology
Definition
the branch of medicine that deals with the incidence, distribution, and possible control of diseases and other factors relating to health.
Term
Social Interaction, Communication & Repetitive Behaviors
Definition
Autism Spectrum Disorders (ASDs) are a group of neurodevelopmental disorders characterized by core deficits in the following three domains: ________.
Term
Autistic disorder, Asperger's disorder & Pervasive Developmental Disorder NOS
Definition
ASDs include the following three diagnoses (as of the writing of this article in 2006): ______.
Term
biologic
Definition
No diagnostically informative _____ tests for autism exist.
Term
behavioral
Definition
The diagnostic criteria are _______.
Term
etiology
Definition
The spectrum nature of symptomology does not necessarily imply a single underlying ______.
Term
intensity
Definition
ASDs present with a wide range of symptom _____, and within each diagnostic category multiple domains of function influence the impact of the disorder.
Term
cooccur
Definition
Other developmental, behavioral, psychiactric, and medical conditions commonly ____ with autism.
Term
behaviorally based
Definition
Recent studies have led to recommendations that young children with ASDs should receive comprehensive _____ educational intervention at a minimum threshold number of hours per week.
Term
medications
Definition
No ____ are currently available to treat the core sypmtoms of ASD.
Term
comorbid behavioral symptoms
Definition
Psychopharmacotherapy may enhance behavioral intervention programs by diminishing _____ and improving compliance or response to the treatments.
Term
nine times
Definition
Preliminary estimates suggest that children with autism have _____ the healthcare expenditures of other Medicaid-eligible children.
Term
three times
Definition
Preliminary estimates suggest that children with autism have _____ the healthcare expenditures of children with mental retardation.
Term
point prevalence or period prevalence
Definition
The most commonly reported measures of autism are _____.
Term
Point prevalence
Definition
The number of persons with disease in a time interval (e.g., one year) divided by number of persons in the population; that is, prevalence at the beginning of an interval plus any incident cases.
Term
Period prevalence
Definition
the proportion of a population that has the condition at some time during a given period ("12-month prevalence", etc.), and includes people who already have the condition at the start of the study period as well as those who acquire it during that period.
Term
artifact
Definition
Some of the trend in administrative data is undoubtedly _____.
Term
4.3:1
Definition
Boys are affected with ASDs more frequently than girls with an average male-to-female ratio of ____.
Term
socioeconomic status
Definition
Positive correlations between autism prevalence and _____ have been consistently reported.
Term
Ascertainment Bias
Definition
Systematic distortion in measuring the true frequency of a phenomenon due to the way in which the data are collected.
Term
inconsistent
Definition
Reports on the relationship between maternal age and autism prevalence have been inconsistent.
Term
genetic susceptibility
Definition
Taken together, twin studies and family studies clearly establish that a ______ to autism exists.
Term
model of inheritance
Definition
Although the heritability of autism has been established, the _____ is still not clear.
Term
full genome screens & candidate gene analysis
Definition
Two principal strategies for identifying specific autism risk genes.
Term
genome screen
Definition
Uses sets of polymorphic markers distributed over all chromosomes in samples of, often multiplex, autism families.
Term
Candidate gene analysis
Definition
Analysis is focused on specific genes believed a priori to have functional importance in a biologic mechanism of potential etiologic relevance to ASDs.
Term
7q
Definition
One promising region of gene analysis appears to be the one located on chromosome _____.
Term
immunologic
Definition
Converging evidence points toward an _____ component in an unknown proportion of individuals with autism.
Term
Neurotransmitters, neuropeptides, and neurotrophins
Definition
Families of protein signaling molecules that orchestrate the neurodevelopment and neural function through complex, reciprocal communication networks that include the immune and endocrine systems.
Term
Serotonin
Definition
_____ has consistently been found at higher concentrations in peripheral blood of subjects with autism.
Term
SSRIs
Definition
_____ can ameliorate autistic behaviors in some affected individuals.
Term
labor and delivery complications
Definition
Many studies have investigated associations between autism risk and maternal obstetric characteristics, _____, and neonatal factors.
Term
environmental
Definition
There have been relatively few empirical investigations of potentially neurotoxic _____ or other xenobiotic exposures and autism risk.
Term
Thaliomide, Valproic acid & Misoprostol
Definition
Three medications with known teratogenic properties have been identified as potential autism risk factors
Term
Thaliomide
Definition
prescribed in the 1950s and 1960s as a sleeping aid and to treat anxiety and morning sickness.
Term
Valproic acid
Definition
an anti epileptic drug also used as a mood stabilizer in bipolar disorder and schizophrenia
Term
Misoprostol
Definition
labor-induced abortion medication that leads to congenital anomalies, such as Mobius syndrome.
Term
Lead & Mercury
Definition
Several metals have been associated with adverse neurodevelopmental outcomes in children and are also considered potential endocrine disrupters (EDs)
Term
teratogen
Definition
Alcohol could play a role in autism risk both directly, as a _____, and indirectly, via a linked genetic predisposition to both autism and alcoholism.
Term
neurodevelopmental conditions
Definition
Autism spectrum disorders (ASDs) are _____ with complex phenotypes and, most likely, several underlying etiologies.
Term
60
Definition
The prevalence of ASDs in developed countries is now considered to be at least _____ per 10,000.
Term
boys
Definition
ASDs occur more commonly in boys, although the gender ratio depends on cognitive status and presence of minor dysmorphology.
Term
changing diagnostic tendency
Definition
More children are being diagnosed with ASDs today than in the past. Some of the prevalence increase is undoubtedly attributable to _____; however, there are insufficient data to determine whether this can explain the entire increasing trend.
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