ArticleMovement disorders : official journal of the Movement Disorder Society2026
Small Strokes, Big Impact: Excessive Mortality After Acute Ischemic Stroke in Parkinson's Disease.
Article in Movement disorders : official journal of the Movement Disorder Society, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundAcute ischemic stroke (AIS) in those with Parkinson's disease (PD) is a growing healthcare burden but mortality studies are significantly lacking.
objectiveTo map short- and long-term survival, stratified by relevant comorbidities and stroke characteristics.
methodsIndividuals from the United States Veterans Health Administration were included. AIS and PD were defined by validated International Classification of Diseases (ICD) codes, pharmacy data, and encounter type. Covariates included demographics, smoking status, cardiovascular comorbidities, post-traumatic stress disorder, traumatic brain injury, and frailty. Individuals with PD and stroke were matched 4:1 to controls and survival was measured over 10 years. Two percent of strokes were manually reviewed for size, location, and mechanism per TOAST (Trial of Org 10172 in Acute Stroke Treatment) criteria.
resultsA total of 3173 cases of PD and AIS were identified and matched to groups of PD-only, stroke-only, and controls (N = 12,692 each). Survival analysis showed PD-only and stroke-only had a predictable increased mortality (added deaths ranged from 1.9 [0.9, 2.9] to 4.7 [2.9, 6.6] per 100 person-years). PD + stroke showed further increased mortality with distinct timelines at 0-1-, 1-5-, and 5-10-year periods and synergy accounted for 2.9 [0.5, 5.4] to 19.3 [14.0, 24.6] additional deaths across 10 years. Effects persisted after matching for cardiovascular comorbidities, neurotrauma, and frailty. PD + stroke compared with stroke-only had smaller strokes (80.0% vs. 63.2%) and no differences in location, mechanism, or recurrence rates.
conclusionsPatients with PD and AIS had greater than expected mortality that was independent of comorbidities or stroke characteristics. This may reflect widespread structural and functional deficits that may warrant a targeted therapeutic strategy. © 2026 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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