Results
Five studies were included in the systematic review, with the prevalence of childhood and adult ADHD in SCZ subjects ranging between 17–57% and 10–47% respectively. Within our cohort, 47% of patients reported positive screening for ADHD symptoms either in childhood or adulthood. 23% reported symptomatology consistent with both childhood and adult ADHD.
Conclusions
We demonstrate a greater presence of ADHD symptomatology in SCZ compared to that reported for ADHD in the general population. Our findings highlight the importance of improved clinical assessment and treatment considerations in a subgroup of patients with SCZ.
Significant outcomes
- 23% of patients with schizophrenia report childhood and adult attention deficit hyperactivity disorder symptoms compared to 2.5% of adults diagnosed in the general population.
Limitations
- The questionnaires are not diagnostic.
- Patients in the sample were not screened for active SCZ or mood symptoms.
- The lack of a new control group from the general population for comparison purposes.
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