Autism has various symptoms raised from neurobiological malfunction of brain, but three symptoms are more common in autistic persons and so used for diagnose autism. Studies have shown that autism is three to four times more common among boys than girls( Fombonne, 2005). The causes of this increase includes: increase number of true diagnose, changing diagnostic criteria, different methods of ascertainment, and use of screening tests (3). ![]() Until the 1990s, autism estimationprevalencewas 4 to 5 persons per 10000 people, but recently prevalence ofall autism spectrum disorders increased(30-90cases per 10000). Minimum time of testing was 5 minutes for CHAT and the maximum time was 90-120 minutes for ASIEP-3.RAADS-R test was the highest specificity and specificity (100%) and the lowest specificity was 14% in ESAT test Conclusion: The results of this study indicate that any of the autism screening tools consider specific skill and various aspects of the disease, careful evaluation is need to choose proper test.Īutism or Autism spectrum disorder ( ASD) is a neurodevelopmental disorder that begin in the first 3 years of life and led to lifelong disability, specially to communications with people and world around these patients( 1).Autism was first described in 1943 by Kanner(2) Patients withautismhave specialmedical,educational and socialneeds, andcorrectestimateof its prevalencein planningis important. CHAT is oldest test and the most recent test is CAST The minimum age that can perform the screening is six months that related to ITC. Result: In this study, 28 screening tests were identified from 1992 to 2014. The search strategy consisted of keywords and medical subject headings for autism and various screening tests. language restriction (Persian and English) was applied. Comprehensive searches of the scientific literature were conducted in textbooks and 8 electronic databases(proquest,wiley,google scholar,SID,Scopus, Web of Science ،Science Direct ، and Medline) and Pediatric book. ![]() Materials and methods: This study is a narrative literature review on screeningtoolsof autism. The aim of this study was assess these tools from various aspects to provide a comprehensive view. Background: Autism is a neurodevelopmental disorder that onset in the first 3 years of life and led to lifelong disability.Despite the early onset of symptoms, diagnosis of thissyndromedoes not happenuntil severalyears later, somany childrenlosethe opportunityfor earlyintervention.There arevarious toolsforscreening anddiagnosis, buttheirdesign, strengths and weaknesses aredifferent.
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