A new paper is out using Swedish multigenerational register data showing that the risk for OCD among relatives of OCD probands increased proportionally to the degree of genetic relatedness. Also, partners of people diagnosed with OCD were more likely to have OCD.
David Mataix-Cols, PhD; Marcus Boman, BSc; Benedetta Monzani, MSc; Christian Rück, MD; Eva Serlachius, MD; Niklas Långström, MD; Paul Lichtenstein, PhD. Population-Based, Multigenerational Family Clustering Study of Obsessive-Compulsive Disorder. JAMA Psychiatry. 2013;():1-9.
http://archpsyc.jamanetwork.com/article.aspx?articleid=1689532
Rücklab - Psychiatry research at Karolinska Institutet 