What's your number? http://smallplanetgroup.com/science-assignment-help/ leads thesis statement on jackie robinson auxiliary oneself Research has shown that there is a genetic component to OCD, so people with a family history of OCD or tic disorders, such as Tourette’s, are at higher risk. “OCD and tic disorders often co-occur, so anyone who has one of these disorders has an elevated risk to develop the other,” says Grice. “Up to 30% of patients with OCD have a current or past history of tics, and up to 45% of patients with Tourette disorder also have OCD or OCD-related symptoms.” The best treatment will depend on correctly categorizing the symptom as a tic or a compulsion.