"Discharged mental patients" do not form a homogeneous group in relation to violence in the community. The prevalence of community violence by people discharged from acute psychiatric facilities varies considerably according to diagnosis and, particularly, co-occurring substance abuse diagnosis or symptoms.

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The right of patients to accept or refuse recommended treatment requires careful reassessment when their decision-making capacities are called into question. Patients must be informed appropriately about treatment decisions and be given an opportunity to demonstrate their highest level of mental functioning. The legal standards for competence include the four related skills of communicating a choice, understanding relevant information, appreciating the current situation and its consequences, and manipulating information rationally. Since competence is a legal concept and can be formally determined only in court, the clinical examiner's proper role is to gather relevant information and decide whether an adjudication of incompetence is required. Treatment for impairment of mental functioning can sometimes restore patients' capacities, making it unnecessary to deprive them of their decision-making powers.

Many persons with schizophrenia may be challenged by the cognitive demands of an informed consent process for research participation. In many cases, their reduced capacity can be compensated by a more intensive educational intervention as part of the informed consent process.

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