Autism screening questionnaire: Diagnostic validity

@article{Berument1999AutismSQ,
  title={Autism screening questionnaire: Diagnostic validity},
  author={Sibel Kazak Berument and Michael L. Rutter and Catherine Lord and Andrew Pickles and Anthony J. Bailey},
  journal={British Journal of Psychiatry},
  year={1999},
  volume={175},
  pages={444 - 451}
}
Background Good interview and diagnostic measures for autism and other pervasive developmental disorders (PDDs) are available but there is a lack of a good screening questionnaire. Aims To develop and test a screening questionnaire based on items in the best available diagnostic interview – the Autism Diagnostic Interview – Revised (ADI–R) Method A 40 -item scale, the Autism Screening Questionnaire (ASQ), was developed and tested on a sample of 160 individuals with PDD and 40 with non-PDD… 

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The SCQ is likely to result in a number of false-positive findings, particularly in children with autism symptomatology, and the balance between sensitivity and specificity is poor, so the ADOS should be considered the most valid and reliable diagnostic instrument in these very young at-risk children.

Screening young people for autism with the developmental behavior checklist.

The DBC-ASA has good validity in discriminating young people with autism and IQ ranging from normal to severe intellectual disability from others using a cutoff score of 17.

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Those interested in using the Social Communication Questionnaire should consider adjusting cutoff scores according to age and purpose, and using it in combination with another measure, to improve sensitivity and specificity.

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The study identified and described a number of ASD screeners that can support clinicians or researchers when deciding whether to carry out a more comprehensive ASD assessment.

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The combined use of two standardised assessment instruments—the Autism Diagnostic Interview Revised (ADI-R) and the Autismdiagnostic Observation Schedule (ADOS)—in a large sample of pre-school children shows good agreement between the instruments especially for children with core Autism.

Validity of the social communication questionnaire in adults with intellectual disabilities and suspected autism spectrum disorder.

The findings support the use of the SCQ-current version for ASD screening in adults with ID, although theSCQ-lifetime version should be used with caution in this population.

Screening for autism

These tools would be recommended as part of more comprehensive surveillance programmes to identify children in need of further assessment but not to ‘screen out’ the possibility of autism.
...

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