Common developmental condition linked to higher risk of Parkinson's-related disorders

Key Points:

• A large study analyzing Medicare and Medicaid data found that older adults diagnosed with autism have a significantly higher risk of developing Parkinson’s disease-related movement disorders compared to the general population.
• The prevalence of parkinsonism was 3.83% among adults with autism alone, 4.32% for those with intellectual disabilities alone, and 4.86% for individuals diagnosed with both conditions, compared to 1.57% in the general population.
• Researchers excluded individuals taking antipsychotic medications to rule out drug-induced symptoms and still found elevated Parkinson’s-related diagnoses among neurodivergent populations, indicating the link is not solely medication-related.
• Experts highlighted the importance of establishing clear baselines of motor skills in autistic adults to monitor changes over time, as early signs of Parkinson’s may be overlooked or misdiagnosed due to existing motor challenges associated with autism.
• Limitations of the study include reliance on insurance claims data, which may contain diagnostic errors and lack information on symptom severity, lifestyle, genetics, and private insurance populations; clinicians are urged to carefully assess motor symptoms in autistic patients.