title: DSM-III diagnoses compared with factor structure of the psychopathology instrument for mentally retarded adults (PIMRA), in an institutionalized, mostly severely retarded population.
abstract: The Psychopathology Instrument for Mentally Retarded Adults (PIMRA) was used to diagnose 163 mentally retarded adults in an institution according to DSM-III axis 1 categories. The relevant 49 items of the PIMRA were subsequently factor analysed. The factors were compared with the diagnoses to examine similarities or differences. The nine factors extracted contained 49.3% of the variance in the data, and were able to categorize correctly 69.3% of the cases with regards to diagnosis through a discriminant analysis. This is statistically different from chance expectations (p less than 0.001) and gives an inter-method agreement of 87.86% and a kappa of 0.62. Some of the factors were recognized as important aspects of traditional psychiatric categories. This makes these diagnostic categories more credible as valid diagnoses for persons from a population like the one studied.
authors.affiliation: Department of Psychiatry and Behavioral Medicine, University of Trondheim, Norway.
authors.forename: O
authors.initials: O
authors.lastname: Linaker
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007326:Institutionalization; D008607:Intellectual Disability / Q000145:classification / Q000523:psychology*; D008297:Male; D001523:Mental Disorders / Q000145:classification / Q000175:diagnosis*; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics; D012917:Social Adjustment; D009626:Terminology as Topic