Journal of the American Academy of Child & Adolescent Psychiatry
ARTICLESDevelopment of a Short Leyton Obsessional Inventory for Children and Adolescents
Section snippets
Participants
The community sample (COM) was recruited from Cambridgeshire secondary schools as part of a prospective study of affective, cognitive, and endocrine predictors of depression (Goodyer et al., 2000). Exclusion criteria were current chronic and potentially life-threatening illness, learning difficulties, limited understanding of English, or recent psychiatric illness (within 3 months of the date of assessment). This nonclinical sample contained individuals with a range of subclinical symptoms who
Factor Analysis of the Community Sample Scores
Rotated varimax factor analysis on scores from the 253 community subjects yielded an 11-item, 3-factor solution (Table 2). The three factors were labeled “compulsions,” “obsessions/incompleteness,” and “concern with cleanliness.” These subscales accounted for 19.8%, 15.2%, and 12.6% of the total variance, respectively, and 47.6% in total. The factor threshold of 0.63 was exceeded for all items in the short measure, with one exception that loaded at 0.62 (see item 14, Table 2). Inter-subscale
DISCUSSION
The study set out to develop a short screen for symptoms of OCD for use with children and adolescents and to explore its ability to function independently of depressed mood. Factor analysis of 253 community adolescents’ responses to the 20-item LOI-CV yielded a robust 11-item measure with three distinct factors: compulsions, obsessions/incompleteness, and concern with cleanliness. These findings closely mirror those from a principal components analysis on responses of 302 normal adults to the
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This work was supported by project and program grants from the Wellcome Trust and a project grant from the PPP Foundation and completed within the MRC Co-operative in Brain, Behavior, and Neuropsychiatry. The authors thank Professor John Cooper for his comments, Dr. Malcolm Adams and Dr. Carol Stott for their advice on statistical analysis, and all the children and adolescents who contributed to this study. Article Plus (online-only) materials for this article appear on the Journal's Web site: www.jaacap.com.