Validity - Schizophrenia

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    • AO1
      • Psychiatric comorbidities are common among patients with schizophrenia and create difficulties in diagnosis of schizophrenia
      • Klosterkotter et al - positive symptoms more useful for diagnosis than negative symptoms
      • Prognosis - people diagnosed as schizophrenic rarely share the same symptoms,nor the same outcomes
    • AO2
      • Comorbidity  and medical complications - Weber et al. found evidence of many comorbid non psychiatric diagnoses among patients with schizophrenia, which affects prognosis
      • Comorbidity and suicide risk - persons with schizophrenia at risk for suicide, with comorbid depression the major cause for suicidal behaviour
      • Ethnicity and misdiagnosis - rates of schizophrenia among African-Caribbeans much higher than white populations, which in part may be a product of misdiagnosis
      • Symptoms - schizophrenic symptoms also found in many other disorders, including depression and DID

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