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Neuroticism, negative life events, and dementia in older White and Black Brazilians
Author(s) -
Capuano Ana W.,
Wilson Robert S.,
Leurgans Sue E.,
Sampaio Carolina,
Barnes Lisa L.,
Farfel Jose M.,
Bennett David A.
Publication year - 2021
Publication title -
international journal of geriatric psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 129
eISSN - 1099-1166
pISSN - 0885-6230
DOI - 10.1002/gps.5491
Subject(s) - neuroticism , dementia , psychology , health and retirement study , odds ratio , demography , odds , gerontology , medicine , clinical psychology , personality , logistic regression , disease , social psychology , sociology
Abstract Objective Exposure to negative life events (NLEs) and neuroticism are associated with dementia. It is unknown whether neuroticism explains or modifies the association of NLEs with dementia in older Black and White Brazilians. Methods A total of 1747 decedents 65 years and older White and Black (11% Black and 23% Mixed) Brazilians, 53% women, were included in the analyses. Data were obtained in a face‐to‐face interview with an informant (71% their children) who knew the decedents for 47 years on average. Dementia was classified using the Clinical Dementia Rating. NLEs were assessed with a 10‐item scale involving common problems (e.g., death, illness, alcoholism, and financial). Neuroticism was assessed with a 6‐item neuroticism scale adapted from the NEO Five‐Factor Inventory. Models adjusted for age, sex, and education. Black and mixed‐race were combined in the analyses. Results NLEs (median of 2) were more common in Blacks than Whites (2.04 vs. 1.82, p = 0.007). More NLEs increased the odds of dementia (OR = 1.112, β = 0.106, p = 0.002), similarly in Blacks and Whites ( β interaction = 0.046, p = 0.526). More NLEs were also associated with higher neuroticism (β = 0.071, p < 0.0001), in Whites but not in Blacks ( β interaction = −0.048, p = 0.006). Neuroticism was associated with higher odds of dementia (OR = 1.658, β = 0.506, p =<0.001), in Whites but not in Blacks ( β interaction = −0.420, p = 0.040). Overall, 34% of the effect of NLEs on dementia was associated with the underlying neuroticism trait in Whites (65%, Indirect OR = 1.060, p < 0.001) but no association was evident in Blacks (6%, Indirect OR = 1.008, p = 0.326). Neuroticism did not moderate the association of NLEs with dementia (OR = 0.979, β = −0.021, p = 0.717). Conclusion The association of NLEs and dementia is partially explained by neuroticism in older White but not in Blacks Brazilians.