The relationship between affective state and the rhythmicity of activity in bipolar disorder

Robert Gonzalez, Carol A. Tamminga, Mauriclo Tohen, Trisha Suppes

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Objective:The aim of this study was to test the relationships between mood state and rhythm disturbances as measured via actigraphy in bipolar disorder by assessing the correlations between manic and depressive symptoms as measured via Young Mania Rating Scale (YMRS) and 30- item Inventory for Depressive Symptomatology, Clinician-Rated (IDS-C-30) scores and the actigraphic measurements of rhythm, the 24-hour autocorrelation coefficient and circadian quotient. Method:The research was conducted at the University of Texas Southwestern Medical Center at Dallas from February 2,2009, to March 30, 2010. 42 patients with a D5M-IV-TR diagnosis of bipolar I disorder were included in the study. YMRS and the IDS-C-30 were used to determine symptom severity. Subjects wore the actigraph continuouslyfor 7 days. The 24-hour autocorrelation coefficient was used as an indicator of overall rhythmicity. The circadian quotient was used to characterize the strength of a circadian rhythm. Results: A greater severity of manic symptoms correlated with a lower degree of rhythmicity and less robust rhythms of locomotor activity as indicated by lower 24-hour autocorrelation (r 0.3406, p .03) and circadian quotient (r 0.5485, p .0002) variables, respectively. No relationship was noted between the degree of depression and 24 hour autocorrelation scores (r 0.1190, P .45) orcircadian quotient (r 0.0083, P .96). Correlation was noted between the 24- hour autocorrelation and circadian quotient scores (r 0.6347, p <.0001). Conclusions:These results support the notion that circadian rhythm disturbances are associated with bipolar disorder and that these disturbances may be associated with clinical signatures of the disorder Further assessment of rhythm disturbances in bipolar disorder is warranted.

Original languageEnglish (US)
JournalJournal of Clinical Psychiatry
Volume75
Issue number4
DOIs
StatePublished - 2014

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Periodicity
Bipolar Disorder
Circadian Rhythm
Actigraphy
Depression
Locomotion
Autocorrelation
Affective
Rhythm
Equipment and Supplies
Research
Rating Scales
Mania

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Arts and Humanities (miscellaneous)

Cite this

The relationship between affective state and the rhythmicity of activity in bipolar disorder. / Gonzalez, Robert; Tamminga, Carol A.; Tohen, Mauriclo; Suppes, Trisha.

In: Journal of Clinical Psychiatry, Vol. 75, No. 4, 2014.

Research output: Contribution to journalArticle

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