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The Vallecas Project: A Cohort to Identify Early Markers and Mechanisms of Alzheimer's Disease.

Olazarán J, Valentí M, Frades B, Zea-Sevilla MA, Ávila-Villanueva M, Fernández-Blázquez MÁ, Calero M, Dobato JL, Hernández-Tamames JA, León-Salas B, Agüera-Ortiz L, López-Álvarez J, Larrañaga P, Bielza C, Álvarez-Linera J, Martínez-Martín P - Front Aging Neurosci (2015)

Bottom Line: Cognitive diagnoses at inclusion were as follows: normal cognition 93.0% and mild cognitive impairment (MCI) 7.0% (3.1% amnestic MCI, 0.1% non-amnestic MCI, 3.8% mixed MCI).The cohort is being followed up annually for 4 years after the baseline.We have established a valuable homogeneous single-center cohort which, by identifying groups of variables associated with high risk of MCI or dementia conversion, should help to clarify the early physiopathological mechanisms of AD and should provide avenues for prompt diagnosis and AD prevention.

View Article: PubMed Central - PubMed

Affiliation: Gregorio Marañón University Hospital , Madrid , Spain.

ABSTRACT

Introduction: Alzheimer's disease (AD) is a major threat for the well-being of an increasingly aged world population. The physiopathological mechanisms of late-onset AD are multiple, possibly heterogeneous, and not well understood. Different combinations of variables from several domains (i.e., clinical, neuropsychological, structural, and biochemical markers) may predict dementia conversion, according to distinct physiopathological pathways, in different groups of subjects.

Methods: We launched the Vallecas Project (VP), a cohort study of non-demented people aged 70-85, to characterize the social, clinical, neuropsychological, structural, and biochemical underpinnings of AD inception. Given the exploratory nature of the VP, multidimensional and machine learning techniques will be applied, in addition to the traditional multivariate statistical methods.

Results: A total of 1169 subjects were recruited between October 2011 and December 2013. Mean age was 74.4 years (SD 3.9), 63.5% of the subjects were women, and 17.9% of the subjects were carriers of at least one ε4 allele of the apolipoprotein E gene. Cognitive diagnoses at inclusion were as follows: normal cognition 93.0% and mild cognitive impairment (MCI) 7.0% (3.1% amnestic MCI, 0.1% non-amnestic MCI, 3.8% mixed MCI). Blood samples were obtained and stored for future determinations in 99.9% of the subjects and 3T magnetic resonance imaging study was conducted in 89.9% of the volunteers. The cohort is being followed up annually for 4 years after the baseline.

Conclusion: We have established a valuable homogeneous single-center cohort which, by identifying groups of variables associated with high risk of MCI or dementia conversion, should help to clarify the early physiopathological mechanisms of AD and should provide avenues for prompt diagnosis and AD prevention.

No MeSH data available.


Related in: MedlinePlus

General procedure and different parts of the study visit of the Vallecas Project.
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Figure 1: General procedure and different parts of the study visit of the Vallecas Project.

Mentions: The general procedure of the Vallecas Project (VP) is shown in Figure 1. After participants consent, inclusion and exclusion criteria are checked and the baseline assessment visit is conducted. Sociodemographic data, vital signs, and blood samples are collected first, followed by neuropsychological, medical, and MRI assessment. The complete study visit is usually carried out in a single day, with convenient breaks. The total duration for the study visit is 4 h.


The Vallecas Project: A Cohort to Identify Early Markers and Mechanisms of Alzheimer's Disease.

Olazarán J, Valentí M, Frades B, Zea-Sevilla MA, Ávila-Villanueva M, Fernández-Blázquez MÁ, Calero M, Dobato JL, Hernández-Tamames JA, León-Salas B, Agüera-Ortiz L, López-Álvarez J, Larrañaga P, Bielza C, Álvarez-Linera J, Martínez-Martín P - Front Aging Neurosci (2015)

General procedure and different parts of the study visit of the Vallecas Project.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4588692&req=5

Figure 1: General procedure and different parts of the study visit of the Vallecas Project.
Mentions: The general procedure of the Vallecas Project (VP) is shown in Figure 1. After participants consent, inclusion and exclusion criteria are checked and the baseline assessment visit is conducted. Sociodemographic data, vital signs, and blood samples are collected first, followed by neuropsychological, medical, and MRI assessment. The complete study visit is usually carried out in a single day, with convenient breaks. The total duration for the study visit is 4 h.

Bottom Line: Cognitive diagnoses at inclusion were as follows: normal cognition 93.0% and mild cognitive impairment (MCI) 7.0% (3.1% amnestic MCI, 0.1% non-amnestic MCI, 3.8% mixed MCI).The cohort is being followed up annually for 4 years after the baseline.We have established a valuable homogeneous single-center cohort which, by identifying groups of variables associated with high risk of MCI or dementia conversion, should help to clarify the early physiopathological mechanisms of AD and should provide avenues for prompt diagnosis and AD prevention.

View Article: PubMed Central - PubMed

Affiliation: Gregorio Marañón University Hospital , Madrid , Spain.

ABSTRACT

Introduction: Alzheimer's disease (AD) is a major threat for the well-being of an increasingly aged world population. The physiopathological mechanisms of late-onset AD are multiple, possibly heterogeneous, and not well understood. Different combinations of variables from several domains (i.e., clinical, neuropsychological, structural, and biochemical markers) may predict dementia conversion, according to distinct physiopathological pathways, in different groups of subjects.

Methods: We launched the Vallecas Project (VP), a cohort study of non-demented people aged 70-85, to characterize the social, clinical, neuropsychological, structural, and biochemical underpinnings of AD inception. Given the exploratory nature of the VP, multidimensional and machine learning techniques will be applied, in addition to the traditional multivariate statistical methods.

Results: A total of 1169 subjects were recruited between October 2011 and December 2013. Mean age was 74.4 years (SD 3.9), 63.5% of the subjects were women, and 17.9% of the subjects were carriers of at least one ε4 allele of the apolipoprotein E gene. Cognitive diagnoses at inclusion were as follows: normal cognition 93.0% and mild cognitive impairment (MCI) 7.0% (3.1% amnestic MCI, 0.1% non-amnestic MCI, 3.8% mixed MCI). Blood samples were obtained and stored for future determinations in 99.9% of the subjects and 3T magnetic resonance imaging study was conducted in 89.9% of the volunteers. The cohort is being followed up annually for 4 years after the baseline.

Conclusion: We have established a valuable homogeneous single-center cohort which, by identifying groups of variables associated with high risk of MCI or dementia conversion, should help to clarify the early physiopathological mechanisms of AD and should provide avenues for prompt diagnosis and AD prevention.

No MeSH data available.


Related in: MedlinePlus