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Citation |
Weinstock LM, Strong D, Uebelacker LA, Miller IW. J. Psychiatr. Res. 2010; 44(14): 979-985. |
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Copyright |
(Copyright © 2010, Elsevier Publishing) |
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DOI |
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PMID |
unavailable |
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Abstract |
In an effort to advance an understanding of the phenomenology of bipolar II depression, the current study used methods based in item response theory to evaluate differences in DSM-IV depression symptom endorsement in an epidemiological sample of individuals with a history of hypomania (i.e., bipolar II depression) in comparison to: a) individuals with a history of mania (i.e., bipolar I depression), and b) individuals without a history of hypomania or mania (i.e., unipolar depression). Clinical interview data were drawn from a subsample (n = 13,753) of individuals with bipolar II, bipolar I, or unipolar depression who had participated in the National Epidemiologic Survey on Alcohol and Related Conditions. A two-parameter item response model was used to estimate differential item functioning (DIF) between these groups. Differences in severity parameter estimates revealed that suicidal ideation/attempt was less likely to be endorsed across most levels of depression severity in bipolar II versus bipolar I disorder. There were no significant differences between groups on the remaining DSM-IV symptoms. Although preliminary, current study data are consistent with recent assertions that depression may be understood as a clinical phenomenon that is consistent across the major affective disorders. An exception to this conclusion may be in the area of suicidal ideation, which requires additional attention. © 2010 Elsevier Ltd. Language: en |
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Keywords |
adult; human; female; male; suicidal ideation; suicide attempt; major depression; Unipolar depression; disease severity; Diagnostic and Statistical Manual of Mental Disorders; article; comparative study; major clinical study; clinical feature; priority journal; bipolar I disorder; bipolar II disorder; medical history; Item response theory; Bipolar I depression; Bipolar II depression |