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This database contains 109 studies, archived under the term: "At risk population"

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Postoperative medical complications associated with anesthesia in older adults with dementia
Objectives: To examine the association between anesthetic technique and postoperative complications in older adults with dementia undergoing hip fracture surgery.; Design: Population-based, retrospective cohort study.; Setting: Ontario, Canada.; Participants: All older adults with dementia who underwent surgery for hip fracture repair in Ontario, Canada, between April 1, 2003 and March 31, 2011.; Measurements: The baseline […]

Impact of smoking on cognitive decline in early old age: the Whitehall II cohort study
Context: Smoking is a possible risk factor for dementia, although its impact may have been underestimated in elderly populations because of the shorter life span of smokers.; Objective: To examine the association between smoking history and cognitive decline in the transition from midlife to old age.; Design: Cohort study.; Setting: The Whitehall II study. The […]

Insulin resistance and medial prefrontal gyrus metabolism in women receiving hormone therapy
Insulin resistance (IR) is a putative risk factor for cognitive decline and dementia, and has been shown to impede neuronal glucose metabolism in animal models. This post hoc study focused on metabolic changes in the medial prefrontal region, a brain region exhibiting decline years before documented cognitive changes, relative to high or low IR status […]

Prospective randomized trial to assess effects of continuing hormone therapy on cerebral function in postmenopausal women at risk for dementia
The objective of this study was to examine the effects of estrogen-based hormone therapy (HT) on regional cerebral metabolism in postmenopausal women (mean age = 58, SD = 5) at risk for development of dementia. The prospective clinical trial design included pre- and post-intervention neuroimaging of women randomized to continue (HT+) or discontinue (HT2) therapy […]

Platelet decline as a predictor of brain injury in HIV infection
An association between platelet decline and increased risk of progression to dementia has been observed in an advanced HIV infection cohort study. This investigation evaluated the prognostic significance of platelet decline for dementia, for psychomotor slowing, and for brain injury, as quantified in vivo, in a much larger population of HIV+ men. Platelet counts and […]

Increased pulse pressure linked to dementia: further results from the Hypertension in the Very Elderly Trial – HYVET
Objectives: High blood pressure (BP) has been associated with increased risk of dementia. Concerns have been raised about lowering BP too far in the very elderly and thereby increasing risk. There is some evidence to suggest a potential ‘J’-shaped relationship between DBP and risk of cognitive impairment. This was investigated using data from the HYpertension […]

Encouraging lifestyle behaviour change in mild cognitive impairment patients: Development of appropriate educational material
Objectives: A healthy lifestyle may help maintain cognitive function and reduce the risk of developing dementia. This study employed a focus group approach in order to gain insight into opinions of mild cognitive impairment (MCI) patients, caregivers (CG) and health professionals (HP) regarding lifestyle and its relationship with cognition. The qualitative data were used to […]

Cognitive training enhances pre-attentive neurophysiological responses in older adults ‘at risk’ of dementia
Background: With predicted increases in dementia incidence, interventions targeting neuroplasticity and neuroprotection are required. Cognitive Training (CT) is an intervention which has been shown to improve aspects of cognition, but the pathophysiological mechanisms contributing to its efficacy are unknown. Objective:We aimed to explore the neurobiological correlates of CT using Mismatch Negativity (MMN), a neurophysiological marker […]

Ingestion of Chlorella reduced the oxidation of erythrocyte membrane lipids in senior Japanese subjects
Accumulation of phospholipid hydroperoxide (PLOOH) in erythrocyte membranes is an abnormality found in patients with senile dementia, including those with Alzheimer’s disease. In our previous studies, dietary xanthophylls (polar carotenoids such as lutein) were hypothesized to inhibit lipid peroxidation. In the present study, we conducted a randomized, double-blind, placebo-controlled human trial to assess the impact […]

Effect of a computerized brain exercise program on cognitive performance in older adults
Objectives: Research indicates an association between stimulating mental activities and better memory performance as people age, but studies on computerized mental stimulation programs are limited. We explored whether computerized brain training exercises improved cognitive performance in older adults.; Methods: In local retirement communities, a convenience sample was randomized into an intervention group (N = 36), […]

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