Schizophrenia in autistic people with intellectual disabilities: Symptom manifestations and identification.

This study looked at how to identify schizophrenia in autistic people who also have intellectual disabilities. Researchers studied 26 people with both conditions and found that their schizophrenia symptoms were clear enough to meet diagnostic criteria. A screening tool called the PAC showed promise for helping identify schizophrenia in this group. The study also found that anxiety and depression were common alongside schizophrenia.

This clinical multi-centre study examined schizophrenia identification in autistic individuals with intellectual disabilities. Researchers analyzed reported symptoms in 26 autistic individuals with intellectual disabilities and co-occurring schizophrenia, comparing them to control groups using the Psychopathology in Autism Checklist (PAC) and Aberrant Behaviour Checklist (ABC). Results showed that schizophrenia symptoms met formal diagnostic criteria in this population. Only the PAC psychosis scale significantly differentiated the schizophrenia group from controls.

Elevated anxiety and depression scores were commonly observed. The study suggests emphasizing core schizophrenia symptoms during assessment and identifies the PAC as a potentially useful screening tool for this complex population.

Assessment of schizophrenia in autistic individuals with intellectual disabilities should focus on core symptoms. The PAC shows promise as a screening tool. Clinicians should routinely assess for anxiety and depression as co-occurring conditions. Specialized diagnostic approaches may be needed for this population.

Small sample size (n=26) limits generalizability. Study design not specified in abstract. No information about inter-rater reliability or diagnostic validation methods. Comparison groups may have selection bias.

The assessment of schizophrenia in autistic people with intellectual disabilities is challenging. This study aimed to explore the identification of schizophrenia in this population. Using data from a clinical multi-centre study, reported symptoms in 26 autistic individuals with intellectual disabilities diagnosed with co-occurring schizophrenia were explored. Scores on two checklists (Psychopathology in Autism Checklist [PAC], Aberrant Behaviour Checklist [ABC]) were compared with two comparison groups: autistic individuals with intellectual disabilities and other mental disorders (94), or no mental disorder (63).

Reported symptoms of schizophrenia in this population met the formal diagnostic criteria. For PAC/ABC scales, only PAC psychosis differed for the schizophrenia group. Among participants with schizophrenia, two were diagnosed with additional mental disorders. Elevated scores for anxiety and depression were common.

Emphasising core symptoms seems necessary when assessing co-occurring schizophrenia in autistic people with intellectual disabilities. The PAC may serve as a helpful screening tool.