Jean-Sébastien Vidal

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BACKGROUND Clinical malaria and severe anaemia are major causes of paediatric hospital admission and death in many malaria-endemic settings. In the absence of an effective and affordable vaccine, control programmes continue to rely on case management while attempting the large-scale deployment of insecticide-treated nets. We did a randomised,(More)
Mild cognitive impairment (MCI) is a heterogeneous cognitive status that can be a prodromal stage of Alzheimer's disease (AD). It is particularly relevant to focus on prodromal stages of AD such as MCI, because patho-physiological abnormalities of AD start years before the dementia stage. Medial temporal lobe (MTL) atrophy resulting from AD lesions and(More)
β-Amyloid (Aβ), a vasoactive protein, and elevated blood pressure (BP) levels are associated with Alzheimer disease (AD) and possibly vascular dementia. We investigated the joint association of midlife BP and Aβ peptide levels with the risk for late-life AD and vascular dementia. Subjects were 667 Japanese-American men (including 73 with a brain autopsy),(More)
We performed a case-control study of Parkinson's disease (PD) in a population characterized by a high prevalence of pesticide exposure and studied the joint effect of pesticide exposure and CYP2D6. Although they are based on a small group of subjects with the joint exposure, our findings are consistent with a gene-environment interaction disease model(More)
Familial aggregation has been consistently found in PD, but it is unclear whether there is a familial aggregation in families of patients with multiple system atrophy (MSA) or progressive supranuclear palsy (PSP). MSA and PSP cases were recruited from a two-arm case control study. One control was matched to each case for age, gender and living area. Medical(More)
BACKGROUND Hyperhomocysteinemia is associated with an increased risk of cognitive impairment in the elderly. Recent studies suggest that folate level may also influence the course of cognitive decline. OBJECTIVE We performed the cross-sectional analysis of the relationship between homocysteine and folate levels and cognitive performances in a(More)
BACKGROUND AND PURPOSE Several cardiovascular risk factors are associated with cognitive disorders in older persons. Little is known about the association of the burden of coronary atherosclerosis with brain structure and function. METHODS This is a cross-sectional analysis of data from the Age, Gene, Environment Susceptibility (AGES)-Reykjavik Study(More)
BACKGROUND Clinical studies reported that treatments for Alzheimer's disease may have an impact on behavioral and psychiatric disorders. We tested the hypothesis that memantine treatment initiation modifies psychotropic medication in real-life practice patients. METHODS A 2-year follow-up cohort study was performed. A sample of patients treated in the(More)
OBJECTIVE To examine the joint association of migraine headache and major depressive disorder on brain volume in older persons without dementia. METHODS Participants (n = 4,296, 58% women) from the population-based Age, Gene/Environment Susceptibility-Reykjavik Study were assessed for migraine headache in 1967-1991 (age 51 years [range 33-65]) according(More)