Predicting genetic loading from symptom patterns in obsessive- compulsive disorder: a latent variable analysis.

Depression and Anxiety
Carmi SchoolerDennis L Murphy

Abstract

Some symptom dimensions in obsessive-compulsive disorder (OCD) patients have a familial and putative genetic foundation, based on replicated findings in studies of sib-pairs with OCD. However, these symptom dimensions are all from exploratory factor analyses of Yale-Brown Obsessive-Compulsive Scale Symptom Checklist ratings based on non-empirically derived symptom categories, rather than individual symptoms. In this study, we used a novel latent variable mixture model analysis to identify meaningful patient subgroupings. This was preceded by a confirmatory factor analysis of a 65-item OCD symptom inventory from 398 OCD probands, which yielded a five-factor solution. Data from all five symptom factors were used in a latent variable mixture model analysis, which identified two statistically separate OCD subpopulations. One group of probands had a significantly higher proportion of OCD-affected afflicted relatives (parents or close parental relatives), whereas the other group had a less prevalent familial OCD. The group with the more familial OCD was also found to have an earlier age of OCD onset, more severe OCD symptoms, and greater psychiatric comorbidity and impairment. Especially if the results are verified in other samples, ...Continue Reading

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Citations

May 27, 2010·Brain Imaging and Behavior·Stephen CorreiaBenjamin D Greenberg
Jun 21, 2013·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Carolyn I RodriguezHelen B Simpson
Feb 27, 2013·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Dennis L MurphyKiara R Timpano
May 5, 2021·The British Journal of Clinical Psychology·Amanda M RainesNorman B Schmidt

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