RELIABILITY OF THE ICD-10 VERSION OF THE PSYCHIATRIC-ASSESSMENT SCHEDULE FOR ADULTS WITH DEVELOPMENTAL DISABILITY (PAS-ADD)

The Psychiatric Assessment Schedule for Adults with Developmental Disa bility (PAS-ADD) is a semi-structured clinical interview designed for use with respondents who have learning disability. The first version w as based on the Present State Examination. The revised version was der ived from the Schedules for Clinical Assessment in Neuropsychiatry (SC AN), and makes ICD 10 diagnoses using the SCAN diagnostic program. Thi s current version has a 4-point scale of severity, compared with the 3 -point scale of the first version. It also has a new module relating t o psychotic disorders. The sample consisted of 40 individuals represen ting a spectrum of neurotic, depressive and psychotic disorders. Video tapes of 40 PAS-ADD interviews were re-rated by trained interviewers w ho had not been involved in the original study in which the videotapes were produced. The mean Kappa across all individual item codes was 0. 65, ranging from 0.94 to 0.35. The mean Kappa agreement on item groups was 0.66. Correlation between total symptom scores was 0.74. Agreemen t on index of definition was Kappa 0.70. We concluded that, agreement was generally lower than for the ICD 9 version. This was probably due mainly to the increase in the severity categories from three to four. However, the new items (most of which related to psychosis) were of co mparable reliability to other items.