What has been learned from twin studies about the etiology of bipolar disorder type I (BPI)?

Updated: May 30, 2019
  • Author: Stephen Soreff, MD; Chief Editor: Glen L Xiong, MD  more...
  • Print
Answer

Twin studies demonstrate a concordance of 33-90% for BPI in identical twins. As identical twins share 100% of their DNA, these studies also show that environmental factors are involved, and there is no guarantee that a person will develop bipolar disorder, even if they carry susceptibility genes.


Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!