Department of Economics and Business Economics

Declining incidence of dementia: A national registry-based study over 20 years

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Lærke Taudorf, Danish Dementia Research Centre, Department of Neurology, Rigshospitalet, University of Copenhagen, Copenhagen Ø, Denmark. Electronic address: laerke.roulund.taudorf@regionh.dk.
  • ,
  • Ane Nørgaard, Department of Neurology, Danish Dementia Research Centre (DDRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
  • ,
  • Sabrina Islamoska, Department of Public Health, University of Copenhagen, Copenhagen, Denmark.
  • ,
  • Kasper Jørgensen, Department of Neurology, Danish Dementia Research Centre (DDRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
  • ,
  • Thomas Munk Laursen
  • Gunhild Waldemar, Department of Neurology, Danish Dementia Research Centre (DDRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.

INTRODUCTION: The aim of this study was to investigate the registry-based national time trends in incidence and prevalence rates of dementia from 1996 to 2015.

METHODS: We assessed annual incidence and prevalence using longitudinal data from nationwide registries on dementia status and demographics on all residents ≥ 65 years old in Denmark.

RESULTS: Our population comprised 2 million people, of whom 152,761 were diagnosed with dementia. The age- and sex-adjusted incidence rate increased, on average, by 9% annually from 1996 to 2003, followed by a 2% annual decline, while total prevalence increased during the whole period.

DISCUSSION: This is the first study to report continuous time trends of incidence and prevalence in an entire national population. The incidence rate has declined steadily since 2003, while the total prevalence is still increasing. Future health care planning on prevention and treatment of dementia should take these findings into account.

Original languageEnglish
JournalAlzheimer's & Dementia
Volume15
Issue11
Pages (from-to)1383-1391
Number of pages9
ISSN1552-5260
DOIs
Publication statusPublished - Nov 2019

    Research areas

  • Dementia, Epidemiology, Incidence, Nationwide study, Prevalence, Registry study, Time trend

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