Cognitive data harmonization manual: A project of the Netherlands Consortium of Dementia Cohorts
Authors/Creators
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Beran, Magdalena1
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Oomens, Julie Elisabeth1
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Moonen, Justine2
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Beekman, Marian3
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De Deyn, Peter Paul
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Frentz, Ingeborg4, 5
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Geerlings, Mirjam I.2, 6
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Huisman, Martijn7
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Ikram, Mohammad Arfan5
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Jaarsma, Eva8, 9
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Kok, Almar7
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Marcolini, Sofia10
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Moll van Charante, Eric P.11, 12
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Richard, Edo13
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Schram, Miranda14
- Slagboom, P. Eline3
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Twait, Emma2, 6
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van der Flier, Wiesje2
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van Sloten, Thomas1, 6
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Verschuren, Monique8
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Vojinovic, Dina3
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Vonk, Jet M. J.15, 16
- Wolters, Frank J.5
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Visser, Pieter Jelle17, 1, 2
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Vos, Stephanie1
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Jansen, Willemijn1
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1.
Maastricht University
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2.
Amsterdam UMC Location VUmc
- 3. Leiden University Medical Center
- 4. UMCG
- 5. Erasmus MC
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6.
University Medical Center Utrecht
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7.
Vrije Universiteit Amsterdam
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8.
National Institute for Public Health and the Environment
- 9. Amsterdam University Medical Centre, Location VUmc
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10.
University Medical Center Groningen
- 11. University of Amsterdam
- 12. Academic Medical Center, University of Amsterdam
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13.
Amsterdam University Medical Centers
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14.
Maastricht University Medical Centre
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15.
University of California San Francisco Medical Center
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16.
Columbia University Irving Medical Center
- 17. Karolinska Institutet
Description
This manual provides detailed guidance on the harmonisation of cognitive data from nine Dutch cohorts relevant to dementia research. It was developed by the cognitive data harmonization working group of the Netherlands Consortium of Dementia Cohorts (NCDC).
Who is it for?
- Researchers working with NCDC cognitive data: the manual offers clear, step-by-step directions for harmonizing data within the consortium;
- Researchers aiming to harmonize cognitive data from other cohort studies: it serves as a practical example and reference for designing harmonization strategies in similar projects.
What does it include?
- A summary of NCDC cohort characteristics;
- Definitions of cognitive status across cohorts and guidance for creating an overarching definition;
- An overview of available cognitive tests and instructions for standardizing and pooling cognition data;
- Practical recommendations for handling learning effects and outliers.
Originally published as supplementary material in: Oomens, J.E., Moonen, J.E., Vos, S.J. et al. Identifying pathways to the prevention of dementia: the Netherlands consortium of dementia cohorts. BMC Neurol 25, 59 (2025). https://doi.org/10.1186/s12883-024-03995-4.
For questions about this manual or advice on the harmonisation of dementia-related research data, please contact Dr. Willemijn Jansen at Maastricht University: Willemijn.jansen@maastrichtuniversity.nl.
Files
Cognitive harmonisation manual NCDC.pdf
Files
(563.7 kB)
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Additional details
Related works
- Is supplement to
- Journal article: 10.1186/s12883-024-03995-4 (DOI)
Dates
- Available
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2025-02-12
- Collected
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2023-04-28/2024-01-31