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Related Experiment Videos

Bipolar I: a five-year prospective follow-up

M B Keller1, P W Lavori, W Coryell

  • 1Department of Psychiatry and Human Behavior, Brown University, Providence, Rhode Island 02906.

The Journal of Nervous and Mental Disease
|April 1, 1993
PubMed
Summary

Patients with bipolar I disorder experiencing mixed or cycling symptoms had slower recovery and higher relapse rates than those with pure manic or depressive episodes. This highlights distinct illness trajectories in bipolar I disorder.

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Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Neuroscience

Background:

  • Bipolar I disorder is a chronic mental illness characterized by distinct mood episodes.
  • Understanding the course and outcome of bipolar I disorder is crucial for effective treatment.
  • Previous research has not fully elucidated the differential trajectories based on symptom presentation.

Purpose of the Study:

  • To prospectively examine the 5-year course of bipolar I illness.
  • To compare recovery and relapse rates among patients with pure manic, pure depressive, and mixed/cycling index episodes.
  • To investigate the impact of treatment on illness course and outcome.

Main Methods:

  • Prospective follow-up of 172 probands with bipolar I disorder for up to 5 years.

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  • Categorization of probands based on index episode symptoms: pure manic, pure depressive, or mixed/cycling.
  • Assessment of recovery from the index episode, subsequent relapse, and recovery from the first prospective episode.

    • Main Results:

    • Pure manic probands showed the fastest recovery (median, 6 weeks), followed by pure depressive (median, 11 weeks), and mixed/cycling probands (median, 17 weeks).
    • Mixed/cycling patients had the lowest cumulative recovery probability from the index episode after 5 years.
    • Mixed/cycling probands experienced faster relapse times and lower recovery rates from prospective episodes compared to pure manic patients.

    Conclusions:

    • Symptom presentation of the index episode significantly influences the course and outcome of bipolar I disorder.
    • Mixed/cycling episodes are associated with a more protracted and challenging illness course.
    • Further research is needed to optimize treatment strategies for patients with mixed/cycling bipolar I disorder.