Chronotype in bipolar disorder: an 18-month prospective study

Jul 4, 2019Revista brasileira de psiquiatria (Sao Paulo, Brazil : 1999)

Sleep-wake patterns in bipolar disorder over 18 months

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Abstract

Among 80 euthymic patients, 43.8% exhibited moderate morningness.

  • is associated with higher rates of obesity or overweight.
  • Patients with an evening preference reported greater anxiety.
  • Better functioning was linked to evening chronotype.
  • Eveningness correlated with more frequent mood episodes but not with psychiatric hospitalizations.
  • A tendency toward depressive episodes was observed in patients with evening chronotype.

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Key numbers

4 of 80
Patients with
4 patients were moderately evening type out of 80 total BD patients.
R = 0.34
Increase in anxiety levels
Nonparametric linear regression shows a correlation between MEQ scores and anxiety levels.
p = 0.04
Mood episodes associated with eveningness
Logistic regression analysis indicates a significant relationship between eveningness and mood episodes.

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