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The correlations between neuropsychiatric symptoms differed between groups. In both PDD and DLB, depression correlated with anxiety (PDD \u03c1=0.54; DLB \u03c1=0.65; both p&lt;0.001). In PDD, depression was additionally correlated with delusions (\u03c1=0.47; p&lt;0.001), apathy (\u03c1=0.41; p&lt;0.001), and sexual preoccupation (\u03c1=0.35; p&lt;0.001), whereas in DLB depression correlated with hallucinations (\u03c1=0.38; p&lt;0.001). PDD patients showed greater impairment in activities of daily living (ADLs) than DLB patients (p&lt;0.001), correlating with motor severity (\u03c1=0.65; p&lt;0.001) and fatigue (\u03c1=0.58; p&lt;0.001). In DLB, impaired ADLs were linked to hallucinations (\u03c1=0.39; p&lt;0.05), poorer cognition (\u03c1=0.47; p&lt;0.01), urinary dysfunction (\u03c1=0.38; p&lt;0.001), and fatigue (\u03c1=0.45; p&lt;0.001).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Despite being grouped under Lewy body dementias, these findings show PDD and DLB have distinct phenotypes reflecting their neurobiological underpinnings. This has implications for symptomatic and disease-modifying management. Future research should explore pathological mechanisms of these characteristics to improve diagnosis and treatment strategies.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00415-026-13649-9","type":"journal-article","created":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T12:22:49Z","timestamp":1770726169000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Comparing phenotypic features between Parkinson\u2019s disease dementia and dementia with Lewy bodies"],"prefix":"10.1007","volume":"273","author":[{"given":"Chaminda Withanachchi","family":"Gunawardana","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter G. 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