Cited by 204Bipolar Disorder and TreatmentCircadian rhythm and melatoninSleep and related disorders

Circadian Phase Variation in Bipolar I Disorder

Mansour, Hader A., Wood, Joel, Chowdari, Kodvali V., Dayal, Madhulika, Thase, Michael E., Kupfer, David J., Monk, Timothy H., Devlin, Bernie +1 more·2005·Chronobiology International

Abstract

Abnormalities in circadian rhythms are prominent features of bipolar I disorder (BD1). To investigate circadian variation in BD1, we evaluated morningness-eveningness (M/E), a stable trait reflecting circadian phase, using the composite scale (CS) among BD1 patients (DSM IV criteria; n = 75), unscreened controls (n = 349), and patients with schizophrenia (SZ) or schizoaffective disorder (SZA) (n = 81). Our analyses showed that CS scores correlated significantly with age but did not differ by gender among the controls. BD1 patients differed significantly from controls and from SZ/SZA patients when age was considered. CS scores were distributed bi-modally among BD1 cases. There are several possible reasons for the observed heterogeneity. Younger BD1 patients, and those with rapid mood swings, were significantly more likely to have lower CS scores (i.e., to score in the 'evening' range and to have later circadian phase). CS scores were also positively correlated with the age at onset and the duration of the most severe depressive episodes. These relationships were not observed among the SZ/SZA groups. Thus, distinct patterns of M/E were noted among BD1 patients and among BD1 subgroups. The impact of medication, mood state, and chronicity on CS scores needs to be considered.

Integrity signals

Registry

Crossref · 10.1081/cbi-200062413

Cites

52 of 52 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Mansour, H. A., Wood, J., Chowdari, K. V., Dayal, M., Thase, M. E., Kupfer, D. J., Monk, T. H., Devlin, B., & Nimgaonkar, V. L.
Affiliations
University of Pittsburgh (US)
Corresponding author
Nimgaonkar, Vishwajit L.
Venue
Chronobiology International
Published
2005-01
Volume
22
Issue
3
Pages
571-584
ISSN
  • 0742-0528 (ISSN-L)
  • 1525-6073
OpenAlex
W2139393158
Cited by
204
References
52
Citations by year
2026: 4 · 2025: 3 · 2024: 3 · 2023: 9 · 2022: 4 · 2021: 11 · 2020: 5 · 2019: 9 · 2018: 11 · 2017: 12 · 2016: 16 · 2015: 13 · 2014: 21 · 2013: 11 · 2012: 13
FWCI
4.61
Type
journal article
Language
en
Open access
closed
Locations
  • Chronobiology International (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (AG 020677, R01AG013396, AG13396, P01AG020677)
  • National Institute of Mental Health (MH 57881, MH56242, MH 66263, R01MH063420, R01MH066263, R01MH057881, MH63420, MH30915)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
bipolar I disorder, circadian rhythm, circadian phase, chronotype, composite scale, schizophrenia, schizoaffective disorder, age of onset, depressive episode duration
MeSH terms
Age Factors, Animals, Bipolar Disorder, Circadian Rhythm, Humans, Personality Tests, Psychotic Disorders, Surveys and Questionnaires, Schizophrenia, Statistics as Topic

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review