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A new study has used network analysis to explore how symptoms of dementia with Lewy bodies connect to one another, offering a different way to understand the condition beyond individual symptoms.
Published in the Journal of Neuropsychiatry and Clinical Neurosciences, the research analysed clinical data from 107 people living with dementia with Lewy bodies. Rather than focusing on how often symptoms occur, the team examined how symptoms interact as part of a wider system.
Using a network based approach, the researchers mapped relationships between cognitive, psychiatric, motor and autonomic features. This allowed them to identify which symptoms appear most central within the overall pattern of the disease.
The analysis found that visual hallucinations and urinary incontinence were among the most strongly connected symptoms, meaning they were linked to many others across the network. The authors suggest these features may play an important role in how symptoms develop and interact over time.
Three main symptom groupings were identified:
- cognitive and perceptual features
- motor and perceptual features
- autonomic and physical symptoms
Interestingly, some symptoms that are commonly associated with Lewy body dementia, including cognitive fluctuations and tactile hallucinations, appeared more isolated within the network. While these symptoms were still predictable from other measures, they showed fewer direct connections to the wider symptom system.
The researchers say this approach may help improve understanding of symptom complexity in Lewy body dementia and could support more precise diagnostic strategies. By identifying symptoms that sit at the centre of the network, clinicians and researchers may be able to focus on features that provide greater diagnostic value.
The study adds to growing interest in systems based approaches to neurodegenerative disease, where conditions are viewed as interacting symptom networks rather than linear pathways.
Dr Sam Moxon
Ajantha Abey
