Login to MyKarger

New to MyKarger? Click here to sign up.

Login with Facebook

Forgot Password? Reset your password

Authors, Editors, Reviewers

For Manuscript Submission, Check or Review Login please go to Submission Websites List.

Submission Websites List

Institutional Login (Shibboleth)

For the academic login, please select your country in the dropdown list. You will be redirected to verify your credentials.

Table of Contents
Vol. 24, No. 3, 2007
Issue release date: August 2007
Section title: Original Research Article
Dement Geriatr Cogn Disord 2007;24:220–228

Validity of Dementia Diagnoses in the Danish Hospital Registers

Phung T.K.T.a · Andersen B.B.a · Høgh P.a · Kessing L.V.b · Mortensen P.B.c · Waldemar G.a
aMemory Disorders Research Group, Department of Neurology, bDepartment of Psychiatry, The Centre of Neuroscience, Copenhagen University Hospital Rigshospitalet, Copenhagen, and cNational Centre of Register-Based Research, Aarhus University Hospital, Aarhus, Denmark
email Corresponding Author

Thien Kieu Thi Phung, MD

Memory Disorders Research Group, Section 6131, Department of Neurology

The Neuroscience Centre, Copenhagen University Hospital Rigshospitalet

9 Blegdamsvej, DK–2100 Copenhagen (Denmark)

Tel. +45 35 45 62 47, Fax +45 35 45 24 46, E-Mail kieu.phung@rh.hosp.dk

Do you have an account?

Login Information

Contact Information

I have read the Karger Terms and Conditions and agree.


Background:The validity of dementia diagnoses in the Danish nationwide hospital registers was evaluated to determine the value of these registers in epidemiological research about dementia. Methods: Two hundred patients were randomly selected from 4,682 patients registered for the first time with a dementia diagnosis in the last 6 months of 2003. The patients’ medical journals were reviewed to evaluate if they fulfilled ICD-10 and/or DSM-IV criteria for dementia and specific dementia subtypes. The patients who were still alive in 2006 were invited to an interview. Results: One hundred and ninety-seven journals were available for review and 51 patients were interviewed. A registered diagnosis of dementia was found to be correct in 169 (85.8%) cases. Regarding dementia subtypes, the degree of agreement between the registers and the results of the validating process was low with a kappa of 0.36 (95% CI 0.24–0.48). Conclusion: The validity of dementia syndrome in the Danish hospital registers was high and allows for epidemiological studies about dementia. Alzheimer’s disease, although underregistered, also had a good validity once the diagnosis was registered. In general, other ICD-10 dementia subtypes in the registers had a low validity and are less suitable for epidemiological research.

© 2007 S. Karger AG, Basel

Article / Publication Details

First-Page Preview
Abstract of Original Research Article

Received: January 29, 2007
Accepted: May 14, 2007
Published online: August 10, 2007
Issue release date: August 2007

Number of Print Pages: 9
Number of Figures: 0
Number of Tables: 6

ISSN: 1420-8008 (Print)
eISSN: 1421-9824 (Online)

For additional information: http://www.karger.com/DEM

Copyright / Drug Dosage / Disclaimer

Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher or, in the case of photocopying, direct payment of a specified fee to the Copyright Clearance Center.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.