Eveningness and Its Associated Impairments in Remitted Bipolar Disorder

Tommy H. Ng, Ka Fai Chung, Chit Tat Lee, Wing Fai Yeung, Fiona Y.Y. Ho

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)


Sleep-wake and circadian rhythm disturbances are common in remitted bipolar disorder. These disturbances include difficulty initiating and maintaining sleep, daytime sleepiness, sleep irregularity, and a circadian tendency toward eveningness. To date, few studies have examined the impact of eveningness on impairments in remitted bipolar disorder. Ninety-eight adults diagnosed with bipolar disorder I, II, or not otherwise specified were evaluated. Hierarchical linear regression analyses showed that eveningness was associated with greater sleep-wake disturbances, more unhealthy dietary habits, worse quality of life, more impaired interpersonal relationships, and more dysfunctional sleep-related cognitions and behaviors, controlling for age, gender, and years of education. Targeted intervention on dysfunctional sleep-related cognitions and behaviors may reverse eveningness and improve functioning in bipolar disorder.
Original languageEnglish
Pages (from-to)650-664
Number of pages15
JournalBehavioral Sleep Medicine
Issue number6
Publication statusPublished - 1 Nov 2016
Externally publishedYes

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Medicine (miscellaneous)
  • Psychology (miscellaneous)
  • Clinical Neurology


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