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Seasonal changes in clinical status in bipolar disorder: a prospective study in 1000 STEP-BD patients.

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Title: Seasonal changes in clinical status in bipolar disorder: a prospective study in 1000 STEP-BD patients.
Authors: Friedman, E. (AUTHOR), Gyulai, L. (AUTHOR), Bhargava, M. (AUTHOR), Landen, M. (AUTHOR), Wisniewski, S. (AUTHOR), Foris, J. (AUTHOR), Ostacher, M. (AUTHOR), Medina, R. (AUTHOR), Thase, M. (AUTHOR)
Source: Acta Psychiatrica Scandinavica. Jun2006, Vol. 113 Issue 6, p510-517. 8p. 1 Chart, 1 Graph.
Subjects: Bipolar disorder, Mental depression, Hypomania, Genetic polymorphisms, Melatonin, Phototherapy
Abstract: Objective: To investigate seasonal and regional effects on bipolar I and II patients. Method: The Systematic Treatment Enhancement Program for Bipolar Disorder (STEP-BD) patients were prospectively examined for monthly change in prevalence rates of depressed and recovered clinical status over the year. General Estimating Equation modeling was used to assess the effect of season on prevalence rates. Additionally, patients were stratified by bipolar subtype and by region. Results: A significantly higher prevalence rate of depression is observed in the northern sites, a significant prevalence by month effect is found only in the bipolar II patients. Conclusion: The prevalence of depression is greater in patients from the northern vs. southern STEP-BD sites. Seasonal peak prevalence rates of depression differ by region. Bipolar II patients were more ill year-round and demonstrated greater monthly fluctuation in prevalence rates of being ill than did bipolar I patients. We conclude that seasonal effects upon bipolar patients vary by region and bipolar subtype. [ABSTRACT FROM AUTHOR]
Copyright of Acta Psychiatrica Scandinavica is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Seasonal changes in clinical status in bipolar disorder: a prospective study in 1000 STEP-BD patients.
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  Data: <searchLink fieldCode="AR" term="%22Friedman%2C+E%2E%22">Friedman, E.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gyulai%2C+L%2E%22">Gyulai, L.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bhargava%2C+M%2E%22">Bhargava, M.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Landen%2C+M%2E%22">Landen, M.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wisniewski%2C+S%2E%22">Wisniewski, S.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Foris%2C+J%2E%22">Foris, J.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ostacher%2C+M%2E%22">Ostacher, M.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Medina%2C+R%2E%22">Medina, R.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Thase%2C+M%2E%22">Thase, M.</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Acta+Psychiatrica+Scandinavica%22">Acta Psychiatrica Scandinavica</searchLink>. Jun2006, Vol. 113 Issue 6, p510-517. 8p. 1 Chart, 1 Graph.
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  Data: <searchLink fieldCode="DE" term="%22Bipolar+disorder%22">Bipolar disorder</searchLink><br /><searchLink fieldCode="DE" term="%22Mental+depression%22">Mental depression</searchLink><br /><searchLink fieldCode="DE" term="%22Hypomania%22">Hypomania</searchLink><br /><searchLink fieldCode="DE" term="%22Genetic+polymorphisms%22">Genetic polymorphisms</searchLink><br /><searchLink fieldCode="DE" term="%22Melatonin%22">Melatonin</searchLink><br /><searchLink fieldCode="DE" term="%22Phototherapy%22">Phototherapy</searchLink>
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  Data: Objective: To investigate seasonal and regional effects on bipolar I and II patients. Method: The Systematic Treatment Enhancement Program for Bipolar Disorder (STEP-BD) patients were prospectively examined for monthly change in prevalence rates of depressed and recovered clinical status over the year. General Estimating Equation modeling was used to assess the effect of season on prevalence rates. Additionally, patients were stratified by bipolar subtype and by region. Results: A significantly higher prevalence rate of depression is observed in the northern sites, a significant prevalence by month effect is found only in the bipolar II patients. Conclusion: The prevalence of depression is greater in patients from the northern vs. southern STEP-BD sites. Seasonal peak prevalence rates of depression differ by region. Bipolar II patients were more ill year-round and demonstrated greater monthly fluctuation in prevalence rates of being ill than did bipolar I patients. We conclude that seasonal effects upon bipolar patients vary by region and bipolar subtype. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Acta Psychiatrica Scandinavica is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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