Key points are not available for this paper at this time.
Obsessive-compulsive disorder clusters in families primarily due to genetic factors. Nonshared environmental factors are at least as important. The quest for candidate genes, nonshared environmental risk factors, and their possible correlation or interaction should continue. The finding of possible assortative mating in OCD is intriguing and should be investigated further.
Mataix‐Cols et al. (Wed,) studied this question.