Seasonality and sleep: A clinical study on euthymic mood disorder patients

Chiara Brambilla, Chiara Gavinelli, Dario Delmonte, Mara Cigala Fulgosi, Barbara Barbini, Cristina Colombo, Enrico Smeraldi

Research output: Contribution to journalArticle

Abstract

Background. Research on mood disorders has progressively focused on the study of seasons and on the mood in association with them during depressive or manic episodes yet few studies have focused on the seasonal fluctuation that characterizes the patient's clinical course both during an illness episode and during euthymic periods. Methods. 113 euthymic outpatients 46 affected by major recurrent depression and 67 affected by bipolar disorder were recruited. We evaluated the impact of clinical "rhythmical" factors: seasonality, sleep disturbance, and chronotype. Patients completed the SPAQ+ questionnaire, the MEQ questionnaire, and the medical outcomes study (MOS) sleep scale. We used t-test analyses to compare differences of clinical "rhythmical" and sociodemographic variables and of differences in the assessment scales among the diagnostic groups. Results. Patients reporting a family history for mood disorders have higher fluctuations throughout seasons. Sleep disturbance is more problematic in unipolars when compared to bipolars. Conclusions. Sleep, light, and seasonality seem to be three interconnected features that lie at the basis of chronobiology that, when altered, have an important effect both on the psychopathology and on the treatment of mood disorders.

Original languageEnglish
Article number978962
JournalDepression Research and Treatment
Volume2012
DOIs
Publication statusPublished - 2012

ASJC Scopus subject areas

  • Clinical Psychology
  • Psychiatry and Mental health

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    Brambilla, C., Gavinelli, C., Delmonte, D., Fulgosi, M. C., Barbini, B., Colombo, C., & Smeraldi, E. (2012). Seasonality and sleep: A clinical study on euthymic mood disorder patients. Depression Research and Treatment, 2012, [978962]. https://doi.org/10.1155/2012/978962