Genetic factors

• Research think genetics play a part in OCD. Having a relative with OCD increases your likelihood of getting OCD
• Evidence for genetic factors OCD

  Billet et al did a meta-analysis of twin studies that had been carried out over a long period

  Found MZ twins if one had OCD 68% chance the other would

  Compare this to 31% for DZ twins
• Evidence for genetic factors OCD

  Pauls et al found 10% of people with immediate relative with OCD also have OCD
• Evidence against genetic factors OCD

  No study has found a 100% concordance rate

  Potential children imitate parent obsessions and compulsions
• Evidence against genetic factors OCD

  Concordance rates don't prove OCD is caused by genetics

  General anxiety is genetic and that going on to develop OCD has other contributing factors