Diagnostic Stability in Bipolar Disorder: A Narrative Review

Area of Science:

• Psychiatry
• Clinical Psychology

Background:

• Diagnostic stability is crucial for the predictive validity of bipolar disorder (BD) diagnoses.
• Understanding factors influencing diagnostic stability is essential for accurate patient assessment and treatment.

Purpose of the Study:

• To review and analyze the existing literature on diagnostic stability in bipolar disorder.
• To identify factors contributing to diagnostic stability and instability in BD.
• To discuss the implications of diagnostic boundaries and delays on stability.

Main Methods:

• A comprehensive literature search was conducted across MEDLINE and EMBASE databases for studies published between 1980 and 2016.
• Thirty-seven articles focusing on BD, psychotic disorders, depression, and general diagnostic stability were included.
• Data analysis involved standardized methods using a predefined form.

Main Results:

• An acceptable degree of diagnostic stability was observed across studies, with mean prospective consistency at 77.4% and retrospective consistency at 67.6%.
• Geographical distribution of studies was uneven, with most conducted in Europe and North America.
• Factors associated with diagnostic instability included extreme ages, female gender, psychotic symptoms, treatment changes, substance abuse, and family history of affective disorder.

Conclusions:

• Overall diagnostic stability for bipolar disorder is considered good, despite methodological variations and identified factors impacting stability.
• Evidence for specific factors negatively impacting stability is currently insufficient for robust conclusions.
• Standardized methodologies are recommended for more accurate assessments of diagnostic stability in future research.