What question did this study set out to answer?

This research examines the accuracy of dementia diagnoses in Danish hospital registers.

January 1, 2007

Validity of Dementia Diagnoses in the Danish Hospital Registers

TPThien Kieu Thi PhungUniversity of Copenhagen BABirgitte AndersenStatens Serum Institut PHPeter HøghUniversity of Copenhagen

Key Points

This research examines the accuracy of dementia diagnoses in Danish hospital registers.
Analyzed dementia registrations in Danish hospital databases.
Evaluated the validity of Alzheimer’s disease and other ICD-10 dementia subtypes.
High validity of dementia syndrome was confirmed in the hospital registers.
Alzheimer's disease's validity improved upon registration despite underregistration.
ICD-10 dementia subtypes generally exhibited lower validity for research.

Abstract

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.

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