Volume 33, Issue 2 pp. 128-135
Research Article

OBSESSIVE–COMPULSIVE PERSONALITY DISORDER: EVIDENCE FOR TWO DIMENSIONS

Mark A. Riddle M.D.

Corresponding Author

Mark A. Riddle M.D.

Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland

Correspondence to: Mark Riddle, Johns Hopkins University School of Medicine, 550 N. Broadway, Suite 203, Baltimore, MD 21205, E-mail: [email protected]Search for more papers by this author
Brion S. Maher M.D.

Brion S. Maher M.D.

Department of Mental Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland

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Ying Wang Ph.D.

Ying Wang Ph.D.

Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland

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Marco Grados M.D.

Marco Grados M.D.

Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland

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O. Joseph Bienvenu M.D.

O. Joseph Bienvenu M.D.

Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland

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Fernando S. Goes M.D.

Fernando S. Goes M.D.

Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland

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Bernadette Cullen M.D.

Bernadette Cullen M.D.

Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland

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Dennis L. Murphy M.D.

Dennis L. Murphy M.D.

Laboratory of Clinical Science, National Institute of Mental Health, National Institute of Health, Bethesda, Maryland

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Scott L. Rauch M.D.

Scott L. Rauch M.D.

Department of Psychiatry, McLean Hospital, Harvard Medical School, Boston, Massachusetts

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Benjamin D. Greenberg M.D.

Benjamin D. Greenberg M.D.

Department of Psychiatry and Human Behavior, Brown Medical School, Butler Hospital, Providence, Rhode Island

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James A. Knowles M.D.

James A. Knowles M.D.

Department of Psychiatry, University of Southern California School of Medicine, Los Angeles, California

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James T. McCracken M.D.

James T. McCracken M.D.

Department of Psychiatry and Biobehavioral Sciences, School of Medicine, University of California Los Angeles, Los Angeles, California

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Anthony Pinto Ph.D.

Anthony Pinto Ph.D.

Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York State Psychiatric Institute, New York City, New York

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John Piacentini Ph.D.

John Piacentini Ph.D.

Department of Psychiatry and Biobehavioral Sciences, School of Medicine, University of California Los Angeles, Los Angeles, California

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David L. Pauls Ph.D.

David L. Pauls Ph.D.

Department of Psychiatry, Psychiatric and Neurodevelopmental Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts

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Steven A. Rasmussen Ph.D.

Steven A. Rasmussen Ph.D.

Department of Psychiatry and Human Behavior, Brown Medical School, Butler Hospital, Providence, Rhode Island

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Yin Yao Shugart Ph.D.

Yin Yao Shugart Ph.D.

Unit of Statistical Genomics, Division of Intramural Research, National Institute of Mental Health, National Institute of Health, Bethesda, Maryland

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Gerald Nestadt M.D.

Gerald Nestadt M.D.

Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland

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Jack Samuels Ph.D.

Jack Samuels Ph.D.

Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland

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First published: 23 November 2015
Citations: 26

Contract grant sponsor: National Institute of Mental Health; Contract grant sponsor: NIH; Contract grant sponsor: NARSAD; Contract grant sponsor: Seaside Therapeutics; Contract grant sponsor: Roche; Contract grant sponsor: Shire Contract grant sponsor: Dart Neuroscience; Contract grant numbers: R01MH50214, MH071507, MH079489, MH079487, MH079488, and MH079494.

Abstract

Background

To determine possible dimensions that underlie obsessive–compulsive personality disorder (OCPD) and to investigate their clinical correlates, familiality, and genetic linkage.

Methods

Participants were selected from 844 adults assessed with the Structured Instrument for the Diagnosis of DSM-IV Personality Disorders (SIDP) in the OCD Collaborative Genetics Study (OCGS) that targeted families with obsessive–compulsive disorder (OCD) affected sibling pairs. We conducted an exploratory factor analysis, which included the eight SIDP-derived DSM-IV OCPD traits and the indecision trait from the DSM-III, assessed clinical correlates, and estimated sib–sib correlations to evaluate familiality of the factors. Using MERLIN and MINX, we performed genome-wide quantitative trait locus (QTL) linkage analysis to test for allele sharing among individuals.

Results

Two factors were identified: Factor 1: order/control (perfectionism, excessive devotion to work, overconscientiousness, reluctance to delegate, and rigidity); and Factor 2: hoarding/indecision (inability to discard and indecisiveness). Factor 1 score was associated with poor insight, whereas Factor 2 score was associated with task incompletion. A significant sib–sib correlation was found for Factor 2 (rICC = .354, P < .0001) but not Factor 1 (rICC = .129, P = .084). The linkage findings were different for the two factors. When Factor 2 was analyzed as a quantitative trait, a strong signal was detected on chromosome 10 at marker d10s1221: KAC LOD = 2.83, P = .0002; and marker d10s1225: KAC LOD = 1.35, P = .006.

Conclusions

The results indicate two factors of OCPD, order/control and hoarding/indecision. The hoarding/indecision factor is familial and shows modest linkage to a region on chromosome 10.

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