Childhood-onset schizophrenia (COS) differs from other conditions and later onset schizophrenia. Which of the following statements about COS is true?
1) Children who develop COS have abnormal cognitive and social development prior to the onset of psychosis.
2) Psychotic children tend to report symptoms immediately to parents and caregivers.
3) Childhood psychosis is only seen in COS.
4) Later onset of COS is linked to poorer prognosis.
