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Article (Scientific journals)
The AD-CSF-index discriminates Alzheimer's disease patients from healthy controls: a validation study.
Molinuevo, Jose L; Gispert, Juan Domingo; Dubois, Bruno et al.
2013In Journal of Alzheimer's Disease, 36 (1), p. 67 - 77
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Keywords :
Amyloid beta-Peptides; Biomarkers; Peptide Fragments; amyloid beta-protein (1-42); tau Proteins; Aged; Alzheimer Disease/cerebrospinal fluid; Alzheimer Disease/diagnosis; Amyloid beta-Peptides/cerebrospinal fluid; Biomarkers/cerebrospinal fluid; Case-Control Studies; Enzyme-Linked Immunosorbent Assay; Female; Humans; Male; Middle Aged; Peptide Fragments/cerebrospinal fluid; Sensitivity and Specificity; tau Proteins/cerebrospinal fluid; Alzheimer's disease; cerebrospinal fluid; diagnostic accuracy; sensitivity; specificity; Neuroscience (all); Clinical Psychology; Geriatrics and Gerontology; Psychiatry and Mental Health; General Medicine; General Neuroscience
Abstract :
[en] [en] BACKGROUND: Cerebrospinal fluid (CSF) biomarkers of Alzheimer's disease (AD) show an acceptable diagnostic sensitivity and specificity; however, their interpretation and ease of use is far from optimal. OBJECTIVE: To study and validate the diagnostic accuracy of an easy-to-use normalized CSF biomarker index, the AD-CSF-index, in different European populations. METHODS: A total of 342 subjects, 103 healthy controls and 239 AD patients, from four European memory clinics were included. The AD-CSF-index was constructed from the addition of normalized values between the minimum and maximum of amyloid and tau protein levels. The diagnostic accuracy, receiver operating characteristic, and regression analysis of the AD-CSF-index and other composite indices were evaluated in this study. RESULTS: AD patients presented a significantly higher AD-CSF-index than healthy subjects (control = 0.5204; AD = 1.2272; p < 0.001). The AD-CSF-index obtained a sensitivity of 88.6% at 85% specificity and also showed a significantly higher diagnostic power (p < 0.05) than the individual CSF biomarkers and other studied indices. The performance of the AD-CSF-index was very similar between ELISA and MesoScale measurements. Cut-off values of approximately 0.75 provided the lowest achievable overall classification errors and a cut-off point of about 0.95 consistently provided specificities above 85%. CONCLUSION: The AD-CSF-index represents a novel approach, combining normalized CSF values, for the biological diagnosis of AD. The AD-CSF-index presents an optimal AUC with high sensitivity and specificity and seems to be a simple and intuitive way to interpret AD CSF biomarker results even from different analytical platforms.
Disciplines :
Neurology
Author, co-author :
Molinuevo, Jose L;  Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Service, Hospital Clínic, Barcelona, Spain. jlmoli@clinic.ub.es
Gispert, Juan Domingo;  BarcelonaBeta Brain Research Centre, Pasqual Maragall Foundation, Barcelona, Spain
Dubois, Bruno;  Alzheimer Institute, Research and Resource Memory Centre, Pitié-Salpêtriére Hospital, Paris, France
HENEKA, Michael  ;  Neurology Department, University of Bonn, Germany
Lleo, Alberto;  Neurology Department, Hospital Sant Pau, CIBERNED, Barcelona, Spain
Engelborghs, Sebastiaan;  Reference Centre for Biological Markers of Dementia (BIODEM), University of Antwerp, Antwerp, Belgium
Pujol, Jesús;  CRC-Mar, Hospital Del Mar, CRC Corporació Sanitària, Barcelona, Spain
de Souza, Leonardo Cruz;  Alzheimer Institute, Research and Resource Memory Centre, Pitié-Salpêtriére Hospital, Paris, France
Alcolea, Daniel;  Neurology Department, Hospital Sant Pau, CIBERNED, Barcelona, Spain
Jessen, Frank;  Department of Psychiatry, University of Bonn, Bonn, Germany
Sarazin, Marie;  Alzheimer Institute, Research and Resource Memory Centre, Pitié-Salpêtriére Hospital, Paris, France
Lamari, Foudil;  Department of Metabolic Biochemistry, AP-HP, Piti'a-Salpêtriére Hospital, Paris, France
Balasa, Mircea;  Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Service, Hospital Clinic, Fundacio Pasqual Maragall, 08036, Barcelona, Spain
Antonell, Anna;  Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Service, Hospital Clinic, Fundacio Pasqual Maragall, 08036, Barcelona, Spain ; Institut D'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Spain
Rami, Lorena;  Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Service, Hospital Clinic, Fundacio Pasqual Maragall, 08036, Barcelona, Spain ; Institut D'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Spain
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External co-authors :
yes
Language :
English
Title :
The AD-CSF-index discriminates Alzheimer's disease patients from healthy controls: a validation study.
Publication date :
2013
Journal title :
Journal of Alzheimer's Disease
ISSN :
1387-2877
eISSN :
1875-8908
Publisher :
IOS Press, Amsterdam, Netherlands
Volume :
36
Issue :
1
Pages :
67 - 77
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 07 May 2024

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