Clinical Differentiation of Bipolar II Disorder From Borderline Personality Disorder

Adam Bayes; Gordon Parker; Kathryn Fletcher


Curr Opin Psychiatry. 2014;27(1):14-20. 

In This Article

Age of Onset

Bipolar disorder in childhood is rare, with late adolescence or young adulthood being the highest onset risk period[18–20] and with onset generally representing a distinct change.[21] By contrast, a distinct onset period is lacking for BPD, with 'negative affectivity' instead established at an early age[22] and many BPD patients reporting being depressed their whole lives.[9] Thus, a clear onset period favours a BP II condition.