Staging bipolar disorder: clinical, biochemical, and functional correlates

Area of Science:

• Psychiatry
• Neuroscience
• Biomarkers

Background:

• Bipolar disorder (BD) lacks validated staging models.
• Clinical variables are crucial for understanding BD progression.

Purpose of the Study:

• To empirically investigate clinical variables for BD staging.
• To identify biomarkers associated with different BD stages.

Main Methods:

• Historical cohort study of 115 BD patients and 25 relatives.
• Collected sociodemographic, clinical, and functional data.
• Assessed serum cytokines, BDNF, and oxidative stress biomarkers; employed cluster and logistic regression analyses.

Main Results:

• Cluster analysis identified two stages: early and late BD.
• Empirical cutoffs included Functioning Assessment Short Test score, episode count, age at onset, and time since first episode.
• Interleukin-6 (IL-6) showed a significant association with the late stage of BD (P=0.029).

Conclusions:

• Clinical, functional, and biochemical variables can inform BD staging.
• This approach may lead to a validated classification system for bipolar disorder.