Borderline Personality Disoder (BPD) is common in bipolar disorder (BD), especially in Type-BD (BD-II). The opposite trend is also true.
Overall, up to 21.6% of BD samples have comorbid BPD. Also, BDP comorbidity rates were highest among BD-II participants (37.7%) recruited in North American studies (26.2%).
A higher percentage of males and higher mean age significantly (p<0.05) predicted a lower prevalence of comorbid BPD in BD.
The adjusted prevalence of BD among people with BPD was 18.5%.
BPD-BD comorbidity is common, with approximately one in five people experiencing a comorbid diagnosis. Both the diagnostic and clinical implications of the matter have been discussed in the text..