Journal of Abnormal Child Psychology

, Volume 41, Issue 3, pp 367–378 | Cite as

Examining the Validity of Cyclothymic Disorder in a Youth Sample: Replication and Extension

  • Anna Van Meter
  • Eric A. Youngstrom
  • Christine Demeter
  • Robert L. Findling
Article

Abstract

DSM-IV-TR defines four subtypes of bipolar disorder (BP): bipolar I, bipolar II, cyclothymic disorder and bipolar not otherwise specified (NOS). However, cyclothymic disorder in children is rarely researched, or often subsumed in an “NOS” category. The present study tests the replicability of findings from an earlier study, and expands on the criterion validity of cyclothymic disorder in youth. Using the Robins and Guze (1970) framework we examined the validity of cyclothymic disorder as a subtype of BP. Using a youth (ages 5–17) outpatient clinical sample (N = 894), participants with cyclothymic disorder (n = 53) were compared to participants with other BP spectrum disorders (n = 399) and to participants with non-bipolar disorders (n = 442). Analyses tested differences in youth with cyclothymic disorder and bipolar disorder not otherwise specified who do, and those who do not, have a parent with BP. Compared to youth with non-bipolar disorders, youth with cyclothymic disorder had higher irritability (p < 0.001), more comorbidity (p < 0.001), greater sleep disturbance (p < 0.005), and were more likely to have a family history of BP (p < 0.001). Cyclothymic disorder was associated with a younger age of onset compared to depression (p < 0.001) and bipolar II (p = 0.05). Parental BP status was not significantly associated with any variables. Results support that cyclothymic disorder belongs on the bipolar spectrum. Epidemiological studies indicate that cyclothymic disorder is not uncommon and involves significant impairment. Failing to differentiate between cyclothymic disorder and bipolar NOS limits our knowledge about a significant proportion of cases of bipolarity.

Keywords

Cyclothymic disorder Pediatric bipolar disorder Validation Replication Subthreshold 

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Anna Van Meter
    • 1
  • Eric A. Youngstrom
    • 1
  • Christine Demeter
    • 2
  • Robert L. Findling
    • 2
  1. 1.CB 3270 University of North CarolinaChapel HillUSA
  2. 2.Case Western Reserve UniversityClevelandUSA

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