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Can Risk-Taking Be an Endophenotype for Bipolar Disorder? A Study on Patients with Bipolar Disorder Type I and Their First-Degree Relatives

Published online by Cambridge University Press:  14 February 2013

Ceren Hıdıroğlu*
Affiliation:
Department of Neuroscience, Health Sciences Institute, Dokuz Eylul University, Izmir, Turkey
Özlem Demirci Esen
Affiliation:
Department of Neuroscience, Health Sciences Institute, Dokuz Eylul University, Izmir, Turkey
Zeliha Tunca
Affiliation:
Department of Psychiatry, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
Şehnaz Neslihan Gűrz Yalçìn
Affiliation:
Department of Psychiatry, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey Etlik Zubeyde Hanim Women's Health Teaching and Research Hospital, Ankara, Turkey
Lauren Lombardo
Affiliation:
Department of Psychology, Temple University, Philadelphia, Pennsylvania
David C. Glahn
Affiliation:
Department of Psychiatry, Yale University, New Haven, Connecticut Olin Neuropsychiatric Research Center, Institute of Living Whitehall Research Building, Hartford, Connecticut
Ayşegül Özerdem
Affiliation:
Department of Neuroscience, Health Sciences Institute, Dokuz Eylul University, Izmir, Turkey Department of Psychiatry, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey Brain Dynamics and Research Center, Dokuz Eylul University, Izmir, Turkey
*
Correspondence and reprint requests to: Ceren Hıdıroğlu, Dokuz Eylul University, Health Sciences Institute, Department of Neuroscience, Izmir, Turkey. E-mail: cerennh@gmail.com

Abstract

Risk-taking behavior and impulsivity are core features of bipolar disorder. Whether they are part of the inherited aspect of the illness is not clear. We aimed to evaluate risk-taking behavior as a potential endophenotype for bipolar disorders, and its relationship with impulsivity and illness features. The Balloon Analogue Risk Task (BART) and Barratt Impulsiveness Scale-11 (BIS-11) were used to assess risk-taking behavior and impulsivity respectively in 30 euthymic bipolar I patients (BD), their 25 asymptomatic first-degree relatives (BD-R), and 30 healthy controls (HC). The primary BART outcome measure was the behavioral adjustment score (number of pumps after trials where the balloon did not pop minus the number of pumps after trials where the balloon popped). BD (p < .001) and BD-R (p = .001) had similar and significantly lower adjustment scores than HC. Only BD scored significantly higher on BIS-11 total (p = .01) and motor (p = .04) subscales than HC. Neither the BART, nor impulsivity scores associated with illness features. A limitation of this study is medicated patients and a heterogeneous BD-R were included. Riskiness may be a candidate endophenotype for bipolar disorder as it appears independently from illness features, presents similarly in BD and BD-R groups and differs from impulsivity. (JINS, 2013, 19, 1–9)

Information

Type
Research Articles
Copyright
Copyright © The International Neuropsychological Society 2013

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