OCD - Biological Explanartions

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Genetic Explanations of OCD

Family Studies =

  • 1st degree relatives, 50% of genes shared
  • Compare OCD rates in relatives of diagnosed case, copared to relatives without disorder.
  • Closer genetic relationship, higher concordance rate.
  • Pauls et al -> 10% 1st degree more likely to develop disorder compared to 2% general population.

Twin Studies = 

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