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Validity of the schizophrenia diagnosis of the Psychiatric Assessment Schedule for Adults with Developmental Disability (PASS-ADD)

Moss, S, Prosser, H and Goldberg, D 1996, 'Validity of the schizophrenia diagnosis of the Psychiatric Assessment Schedule for Adults with Developmental Disability (PASS-ADD)' , British Journal of Psychiatry, 168 (3) , pp. 359-367.

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    Abstract

    Background: first rank symptoms are central to the diagnosis of schizophrenia, but their complexity makes it difficult to validly detect them in people with learning disability. This report investigates ability of PAS-ADD to detect schizophrenia, validated against expert clinical opinion. Method: the sample consisted of 98 patients with learning disabilities and a key informant for each sample member. Clinical opinions of the referring psychiatrists were sought using a symptom checklist. Reportage of remission, and the number of core schizophrenia symptoms identified, were used to estimate level of symptom activity at time of interview. Results: the proportion of schizophrenia cases detected by PAS-ADD increases with the number of active core symptoms identified by the referrer. Where two or more core symptoms were indicated, PAS-ADD detected 71% cases. The most frequently fulfilled criterion was third-person auditory hallucinations. Six schizophrenia diagnoses disagreed with the clinician, four of which were referred as being hypomania. Overall symptom frequency detected by PAS-ADD was positively correlated with IQ. Conclusions: results suggest there may be scope for modifying the ICD-10 diagnostic algorithm for use with learning disability, particularly in relation to the delusions and negative symptoms criteria.

    Item Type: Article
    Themes: Health and Wellbeing
    Schools: Colleges and Schools > College of Health & Social Care
    Colleges and Schools > College of Health & Social Care > School of Nursing, Midwifery, Social Work & Social Sciences > Centre for Social Justice Research
    Journal or Publication Title: British Journal of Psychiatry
    Publisher: Maney Publishing
    Refereed: Yes
    ISSN: 0007-1250
    Depositing User: H Prosser
    Date Deposited: 26 Sep 2011 11:44
    Last Modified: 20 Aug 2013 18:10
    URI: http://usir.salford.ac.uk/id/eprint/17699

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