| 1. |
- Freak-Poli, Rosanne, et al.
(författare)
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Loneliness, Not Social Support, Is Associated with Cognitive Decline and Dementia Across Two Longitudinal Population-Based Cohorts
- 2022
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Ingår i: Journal of Alzheimer's Disease. - : IOS Press. - 1387-2877 .- 1875-8908. ; 85:1, s. 295-308
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Tidskriftsartikel (refereegranskat)abstract
- Background: Poor social health is likely associated with cognitive decline and risk of dementia; however, studies show inconsistent results. Additionally, few studies separate social health components or control for mental health.Objective: To investigate whether loneliness and social support are independently associated with cognitive decline and risk of dementia, and whether depressive symptoms confound the association.Methods: We included 4,514 participants from the population-based Rotterdam Study (RS; aged 71±7SD years) followed up to 14 years (median 10.8, interquartile range 7.4-11.6), and 2,112 participants from the Swedish National Study on Aging and Care in Kungsholmen (SNAC-K; aged 72±10SD years) followed up to 10 years (mean 5.9±1.6SD). At baseline, participants were free of major depression and scored on the Mini-Mental State Examination (MMSE) ≥26 for RS and ≥25 for SNAC-K. We investigated loneliness, perceived social support, and structural social support (specifically marital status and number of children). In both cohorts, dementia was diagnosed and cognitive function was repeatedly assessed with MMSE and a global cognitive factor (g-factor).Results: Loneliness was prospectively associated with a decline in the MMSE in both cohorts. Consistently, persons who were lonely had an increased risk of developing dementia (RS: HR 1.34, 95%CI 1.08-1.67; SNAC-K: HR 2.16, 95%CI 1.12-4.17). Adjustment for depressive symptoms and exclusion of the first 5 years of follow-up did not alter results. Neither perceived or structural social support was associated with cognitive decline or dementia risk.Conclusion: Loneliness, not social support, predicted cognitive decline and incident dementia independently of depressive symptoms.
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| 2. |
- Freak-Poli, Rosanne, et al.
(författare)
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Loneliness, Not Social Support, Is Associated with Cognitive Decline and Dementia Across Two Longitudinal Population-Based Cohorts
- 2022
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Ingår i: Journal of Alzheimer's Disease. - 1387-2877 .- 1875-8908. ; 85:1, s. 295-308
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Tidskriftsartikel (refereegranskat)abstract
- Background: Poor social health is likely associated with cognitive decline and risk of dementia; however, studies show inconsistent results. Additionally, few studies separate social health components or control for mental health.Objective: To investigate whether loneliness and social support are independently associated with cognitive decline and risk of dementia, and whether depressive symptoms confound the association.Methods: We included 4,514 participants from the population-based Rotterdam Study (RS; aged 71 +/- 7SD years) followed up to 14 years (median 10.8, interquartile range 7.4-11.6), and 2,112 participants from the Swedish National Study on Aging and Care in Kungsholmen (SNAC-K; aged 72 +/- 10SD years) followed up to 10 years (mean 5.9 +/- 1.6SD). At baseline, participants were free of major depression and scored on the Mini-Mental State Examination (MMSE) >= 26 for RS and >= 25 for SNAC-K. We investigated loneliness, perceived social support, and structural social support (specifically marital status and number of children). In both cohorts, dementia was diagnosed and cognitive function was repeatedly assessed with MMSE and a global cognitive factor (g-factor).Results: Loneliness was prospectively associated with a decline in the MMSE in both cohorts. Consistently, persons who were lonely had an increased risk of developing dementia (RS: HR 1.34, 95% CI 1.08-1.67; SNAC-K: HR 2.16, 95% CI 1.12-4.17). Adjustment for depressive symptoms and exclusion of the first 5 years of follow-up did not alter results. Neither perceived or structural social support was associated with cognitive decline or dementia risk.Conclusion: Loneliness, not social support, predicted cognitive decline and incident dementia independently of depressive symptoms.
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| 3. |
- Song, Ruixue, et al.
(författare)
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Associations Between Cardiovascular Risk, Structural Brain Changes, and Cognitive Decline
- 2020
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Ingår i: Journal of the American College of Cardiology. - : Elsevier BV. - 0735-1097 .- 1558-3597. ; 75:20, s. 2525-2534
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND The impact of cardiovascular risk burden on cognitive trajectories and brain structure changes remains unclear. OBJECTIVES This study aimed to examine whether cardiovascular risk burden assessed by the Framingham General Cardiovascular Risk Score (FGCRS) is associated with cognitive decline and structural brain differences. METHODS Within the Rush Memory and Aging Project, 1,588 dementia-free participants (mean age: 79.5 years) were followed for up to 21 years. FGCRS was assessed at baseline and categorized into tertiles (lowest, middle, and highest). Episodic memory, semantic memory, working memory, visuospatial ability, and perceptual speed were assessed annually with a battery of 19 tests, from which composite scores were derived. A subsample (n = 378) of participants underwent magnetic resonance imaging. Structural total and regional brain volumes were estimated. Data were analyzed using linear mixed-effects models and linear regression models. RESULTS In all participants, FGCRS ranged from 4 to 28 (mean score: 15.6 +/- 3.7). Compared with the lowest tertile of FGCRS, the highest tertile was associated with faster decline in global cognition (beta = -0.019; 95% confidence interval [CI]: -0.035 to -0.003), episodic memory (beta = -0.023; 95% CI: -0.041 to -0.004), working memory (beta = -0.021; 95% CI: -0.035 to -0.007), and perceptual speed (beta = -0.027; 95% CI: -0.042 to -0.011) over the follow-up. In magnetic resonance imaging data analyses, higher FGCRS was related to smaller volumes of the hippocampus (beta = -0.021; 95% CI: -0.042 to -0.000), gray matter (beta = -1.569; 95% CI: -2.757 to -0.382), and total brain (beta = -1.588; 95% CI: -2.832 to -0.344), and greater volume of white matter hyperintensities (beta = 0.035; 95% CI: 0.001 to 0.069). CONCLUSIONS Higher cardiovascular risk burden may predict decline in episodic memory, working memory, and perceptual speed and is associated with neurodegeneration and vascular lesions in the brain.
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| 4. |
- Dintica, Christina S., et al.
(författare)
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Impaired olfaction is associated with cognitive decline and neurodegeneration in the brain
- 2019
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Ingår i: Neurology. - 0028-3878 .- 1526-632X. ; 92:7, s. e700-e709
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Tidskriftsartikel (refereegranskat)abstract
- ObjectiveWe aimed to examine whether impaired olfaction is associated with cognitive decline and indicators of neurodegeneration in the brain of dementia-free older adults.MethodsWithin the Rush Memory and Aging Project, 380 dementia-free participants (mean age = 78 years) were followed for up to 15 years, and underwent MRI scans. Olfactory function was assessed using the Brief Smell Identification Test (B-SIT) at baseline, and categorized as anosmia (B-SIT <6), hyposmia (B-SIT 6-10 in men and 6-10.25 in women), and normal (B-SIT 10.25-12 in men and 10.5-12 in women). Cognitive function was annually assessed with a battery of 21 tests, from which composite scores were derived. Structural total and regional brain volumes were estimated. Data were analyzed using linear regression and mixed-effects models.ResultsAt study entry, 138 (36.3%) had normal olfactory function, 213 (56.1%) had hyposmia, and 29 (7.6%) had anosmia. In multiadjusted mixed-effects models, hyposmia (beta = -0.03, 95% confidence interval [CI] -0.05 to -0.02) and anosmia (beta = -0.13, 95% CI -0.16 to -0.09) were associated with faster rate of cognitive decline compared to normal olfaction. On MRI, impaired olfaction (hyposmia or anosmia) was related to smaller volumes of the hippocampus (beta = -0.19, 95% CI -0.33 to -0.05), and in the entorhinal (beta = -0.16, 95% CI -0.24 to -0.08), fusiform (beta = -0.45, 95% CI -0.78 to -0.14), and middle temporal (beta = -0.38, 95% CI -0.72 to -0.01) cortices.ConclusionImpaired olfaction predicts faster cognitive decline and might indicate neurodegeneration in the brain among dementia-free older adults.
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| 5. |
- Dintica, Christina S., et al.
(författare)
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Joint trajectories of episodic memory and odor identification in older adults : patterns and predictors
- 2021
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Ingår i: Aging. - : Impact Journals, LLC. - 1945-4589. ; 13:13, s. 17080-17096
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Tidskriftsartikel (refereegranskat)abstract
- Emerging evidence suggests that olfactory function is closely linked to memory function. The aims of this study were to assess whether olfactory and episodic memory functions follow similar age-related decline trajectories, to identify different patterns of decline, as well as predictors of the patterns. 1023 participants from the Memory and Aging Project were followed for up to 8 years with annual episodic memory and odor identification assessments. Trajectories were modelled using growth mixture models. Multivariate logistic regression was used to identify pattern predictors. Three patterns of joint trajectories were identified; Class 1- stable average performance in both functions (n=690, 67.4%); Class 2- stable average episodic memory and declining odor identification (n=231, 22.6%); and Class 3- decline in both functions (n=102, 10.0%). Class predictors included age, sex, APOE epsilon 4 status, cognitive activity level and BMI. Participants in Class 3 were most likely to develop dementia. Episodic memory and olfactory function show similar trajectories in aging. Such classification can contribute to a better understanding of the factors related to cognitive decline and dementia.
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| 6. |
- Dintica, Christina S., et al.
(författare)
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The relation of poor mastication with cognition and dementia risk : a population-based longitudinal study
- 2020
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Ingår i: Aging. - : Impact Journals LLC. - 1945-4589. ; 12:9, s. 8536-8548
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Tidskriftsartikel (refereegranskat)abstract
- We investigated the effect of poor masticatory ability on cognitive trajectories and dementia risk in older adults. 544 cognitively intact adults aged =50 were followed for up to 22 years. Cognitive domains (verbal, spatial/fluid, memory, and perceptual speed) were assessed at baseline and follow-ups. Dementia was ascertained according to standard criteria. Masticatory ability was assessed using the Eichner Index and categorized according to the number of posterior occlusal zones: A (all four), B (3-1), and C (none).At baseline, 147 (27.0%) participants were in Eichner category A, 169 (31.1%) in B and 228 (41.9%) in C. After the age of 65, participants in Eichner category B and C showed an accelerated decline in spatial/fluid abilities (beta: -0.16, 95% CI: -0.30 to -0.03) and (beta: -0.15, 95% CI: -0.28 to -0.02), respectively. Over the follow-up, 52 incident dementia cases were identified. Eichner categories B or C were not associated with an increased risk of dementia, compared to category A (Hazard Ratio [HR]: 0.83, 95% CI: 0.39 to 1.76 and HR: 0.63, 95% CI: 0.30 to 1.29, respectively).Poor masticatory ability is associated with an accelerated cognitive decline in fluid/spatial abilities, however it was not related to a higher risk of dementia.
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| 7. |
- Dintica, Christina S., et al.
(författare)
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Tooth loss is associated with accelerated cognitive decline and volumetric brain differences : a population-based study
- 2018
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Ingår i: Neurobiology of Aging. - : Elsevier BV. - 0197-4580 .- 1558-1497. ; 67, s. 23-30
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Tidskriftsartikel (refereegranskat)abstract
- Tooth loss has been related to cognitive impairment; however, its relation to structural brain differences in humans is unknown. Dementia-free participants (n = 2715) of age >= 60 years were followed up for up to 9 years. A subsample (n = 394) underwent magnetic resonance imaging at baseline. Information on tooth loss was collected at baseline, and cognitive function was assessed using the Mini-Mental State Examination at baseline and at follow-ups. Data were analyzed using linear mixed effects models and linear regression models. At baseline, 404 (14.9%) participants had partial tooth loss, and 206 (7.6%) had complete tooth loss. Tooth loss was significantly associated with a steeper cognitive decline (beta: -0.18, 95% confidence interval [CI]: -0.24 to -0.11) and remained significant after adjusting for or stratifying by potential confounders. In cross-sectional analyses, persons with complete or partial tooth loss had significantly lower total brain volume (beta: -28.89, 95% CI: -49.33 to -8.45) and gray matter volume (beta: -22.60, 95% CI: -38.26 to -6.94). Thus, tooth loss may be a risk factor for accelerated cognitive aging.
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| 8. |
- Laukka, Erika J, 1986-, et al.
(författare)
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Olfactory impairment and domain‐specific cognitive decline : A 12‐year population‐based study
- 2023
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Ingår i: Alzheimer's & Dementia. - : John Wiley & Sons. - 1552-5260 .- 1552-5279. ; 19:S18
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Tidskriftsartikel (refereegranskat)abstract
- Background: Olfactory impairment has been associated with both cognitive impairment and dementia and Alzheimer’s disease (AD). This study aimed to investigate the association between olfactory dysfunction (OD) and change trajectories in different cognitive domains in aging. Method: Participants (n = 2473, mean age = 72 years, 61% female) from the population-based Swedish National study on Aging and Care-Kungsholmen (SNAC-K) were repeatedly assessed with tasks measuring episodic memory, semantic memory, verbal fluency, and perceptual speed across 12 years. OD was measured at baseline and participants were categorized as normosmic, hyposmic, or anosmic based on the Sniffin’ Sticks odor identification task. Linear mixed-effects models were used to assess the associations between baseline OD and rates of cognitive decline. Result: OD was related to poorer baseline performance and faster rates of decline during follow-up in all examined domains, as well as in global cognition. Associations were generally more pronounced for anosmia compared to hyposmia. Conclusion: Olfactory impairment is associated with accelerated decline in aging across a wide range of cognitive domains.
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| 9. |
- Wang, Rui, et al.
(författare)
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Shared risk and protective factors between Alzheimer's disease and ischemic stroke : A population-based longitudinal study.
- 2021
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Ingår i: Alzheimer's & Dementia. - : John Wiley & Sons. - 1552-5260 .- 1552-5279. ; 17:2, s. 191-204
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Tidskriftsartikel (refereegranskat)abstract
- INTRODUCTION: Stroke, especially ischemic stroke's (IS) link with Alzheimer's disease (AD) remains unclear.METHODS: This prospective cohort study included 2459 AD- and cerebrovascular disease-free older adults at baseline (mean age 71.9 ± 10.3 years, Stockholm, Sweden). Using Cox regressions, shared risk factors (SRFs) and shared protective factors (SPFs) between AD and IS were recognized when their hazard ratios in both AD and IS models were significant and in the same direction.RESULTS: During the follow-up period of up to 15 years, 132 AD and 260 IS mutually exclusive cases were identified. SRFs were low education, sedentary lifestyle, and heart diseases. High levels of psychological well-being, actively engaging in leisure activities, and a rich social network were SPFs. Having ≥1 SPF reduced 47% of AD and 28% of IS risk among people with a low risk profile (<2 SRFs), and 38% of AD and 31% of IS risk with a high risk profile (≥2 SRFs). In total, 57.8% of AD/IS cases could be prevented if individuals have ≥1 SPF and no SRF.DISCUSSION: AD and IS share risk/protective profiles, and SPFs seem to counteract the adverse effects of SRFs on both AD and IS.
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