ArticleThe Gerontologist2025
Lucid episodes in people with advanced dementia: characterizing caregiver reports to advance definition and measurement of episodes.
Article in The Gerontologist, 2025. 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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10 authors.
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Abstract
BACKGROUND AND
objectivesLucid episodes (LEs) in advanced dementia are characterized by spontaneous, transient recovery of functional abilities. Despite recent increases in research on this previously understudied phenomenon, standard definitional criteria are lacking, presenting challenges for research. Researchers have proposed a preliminary framework to guide uniform labeling and operationalization of salient data elements for investigating LEs and developing definitional criteria. This study leverages this framework to characterize reports of LEs from caregivers and advance their definition and measurement. RESEARCH DESIGN AND
methodsFamily caregivers (N = 259) completed an electronic survey with quantitative and open-ended questions about LEs they witnessed (N = 479 episodes). Respondents were purposively sampled for qualitative interviews. Open-ended question responses (n = 208) and in-depth interviews (n = 24) were analyzed using content analysis.
resultsCaregiver descriptions suggest that the content and context of LEs are heterogeneous. Descriptions included observable changes from baseline, with behavior or communication that was distinguishable from routine cognitive fluctuations. LEs were sometimes, but not always specified by logically organized actions; recognition or awareness of people, emotions, and surroundings; and insight of their cognitive limitations. Many LEs required deep personal knowledge to attribute it as a meaningful shift. DISCUSSION AND IMPLICATIONS: Findings suggest that definitional features may universally specify a significant return of ability with more flexible criteria for how this return manifests in observed actions and domains of recovery (i.e., insight, function, and communication). The impact of LEs on observers may be better measured separately, although further research should explore this.
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