Autism Linked to Higher Parkinsonism Risk in Adults

Older adults diagnosed with autism face a substantially elevated risk of developing Parkinson's disease-related movement disorders. This finding comes from an extensive analysis of Medicare and Medicaid claims data covering nearly 57 million Americans aged 45 and older between 2017 and 2019.

The study specifically examined individuals on the autism spectrum and those with intellectual disabilities, comparing their rates of parkinsonism to the general population. Parkinsonism encompasses neurological conditions characterized by symptoms such as tremors, muscle rigidity, and balance difficulties.

Crucially, researchers excluded individuals taking antipsychotic medications, which are known to cause Parkinson's-like symptoms. Despite this exclusion, neurodivergent populations still exhibited higher rates of Parkinson's-related diagnoses. The prevalence was 3.83% among adults with autism, 4.32% for those with intellectual disabilities, and 4.86% for individuals with both conditions, compared to 1.57% in the general population.

This research highlights the need for clinicians to establish clear baselines of motor skills in autistic adults for ongoing monitoring. Experts emphasize that early indicators of Parkinson's disease in autistic individuals can be missed or mistaken for existing motor challenges, underscoring the importance of close observation by physicians, caregivers, and family members to ensure timely intervention.