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Psychopathologic structure of bipolar disorders: exploring dimensional phenotypes, their relationships, and their associations with bipolar I and II disorders

  • Ji Hyun Baek (a1), Kyooseob Ha (a2) (a3), Yongkang Kim (a4), Young-ah Cho (a1), So Yung Yang (a1), Yujin Choi (a5), Sung-Lee Jang (a5), Taesung Park (a4), Tae Hyon Ha (a6) and Kyung Sue Hong (a1) (a5)...



Given its diverse disease courses and symptom presentations, multiple phenotype dimensions with different biological underpinnings are expected with bipolar disorders (BPs). In this study, we aimed to identify lifetime BP psychopathology dimensions. We also explored the differing associations with bipolar I (BP-I) and bipolar II (BP-II) disorders.


We included a total of 307 subjects with BPs in the analysis. For the factor analysis, we chose six variables related to clinical courses, 29 indicators covering lifetime symptoms of mood episodes, and 6 specific comorbid conditions. To determine the relationships among the identified phenotypic dimensions and their effects on differentiating BP subtypes, we applied structural equation modeling.


We selected a six-factor solution through scree plot, Velicer's minimum average partial test, and face validity evaluations; the six factors were cyclicity, depression, atypical vegetative symptoms, elation, psychotic/irritable mania, and comorbidity. In the path analysis, five factors excluding atypical vegetative symptoms were associated with one another. Cyclicity, depression, and comorbidity had positive associations, and they correlated negatively with psychotic/irritable mania; elation showed positive correlations with cyclicity and psychotic/irritable mania. Depression, cyclicity, and comorbidity were stronger in BP-II than in BP-I, and they contributed significantly to the distinction between the two disorders.


We identified six phenotype dimensions; in addition to symptom features of manic and depressive episodes, various comorbidities and high cyclicity constructed separate dimensions. Except for atypical vegetative symptoms, all factors showed a complex interdependency and played roles in discriminating BP-II from BP-I.


Corresponding author

Author for correspondence: Kyung Sue Hong, E-mail:


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Psychopathologic structure of bipolar disorders: exploring dimensional phenotypes, their relationships, and their associations with bipolar I and II disorders

  • Ji Hyun Baek (a1), Kyooseob Ha (a2) (a3), Yongkang Kim (a4), Young-ah Cho (a1), So Yung Yang (a1), Yujin Choi (a5), Sung-Lee Jang (a5), Taesung Park (a4), Tae Hyon Ha (a6) and Kyung Sue Hong (a1) (a5)...


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