Prevalence and geographical variation of dementia in New Zealand from 2012 to 2015: Brief report utilising routinely collected data within the Integrated Data Infrastructure
Open Access
- 11 May 2020
- journal article
- research article
- Published by Wiley in Australasian Journal on Ageing
- Vol. 39 (3), 297-304
- https://doi.org/10.1111/ajag.12790
Abstract
Objectives There are no national dementia epidemiological studies using New Zealand (NZ) data. NZ routinely collects health‐care data within the Integrated Data Infrastructure (IDI). The study objectives were to 1) investigate late‐onset dementia estimates using the IDI between 2012‐2015 and compare these with 2) published estimates, and 3) variations between North and South Islands and ethnicity. Methods A population‐based, retrospective cohort design was applied to routinely collected de‐identified health/administrative IDI data. Dementia was defined by ICD‐10‐AM dementia codes or anti‐dementia drugs. Results Approximately 2% of those aged ≥60 years had dementia, lower than published estimates. Dementia was higher in North Island; in 80‐ to 89‐year‐olds; among the Māori population when age‐standardised, and 9% of all dementia cases had >1 dementia sub‐type. Conclusions To our knowledge, this is the first study ascertaining dementia estimates using NZ’s whole‐of‐population IDI data. Estimates were lower than existing NZ estimates, for several reasons. Further work is required, including expanding IDI data sets, to develop future estimates that better reflect NZ’s diverse population.Keywords
Funding Information
- Medical Research Council (MR/ L501530/1 MR/K02992/1, MR/K02992/1)
- Biotechnology and Biological Sciences Research Council (MR/ L501530/1 MR/K02992/1, MR/K02992/1)
This publication has 18 references indexed in Scilit:
- Prevalence and concordance between the clinical and the post-mortem diagnosis of dementia in a psychogeriatric clinicNeurología, 2018
- Estimating the prevalence of dementia using multiple linked administrative health records and capture–recapture methodologyEmerging Themes in Epidemiology, 2017
- Comparison of dementia recorded in routinely collected hospital admission data in England with dementia recorded in primary careEmerging Themes in Epidemiology, 2016
- Geographical Variation in Dementia Mortality in Italy, New Zealand, and Chile: The Impact of Latitude, Vitamin D, and Air PollutionDementia and Geriatric Cognitive Disorders, 2016
- The REporting of studies Conducted using Observational Routinely-collected health Data (RECORD) StatementPLoS Medicine, 2015
- Geographical Variation in DementiaEpidemiology, 2015
- Prediction of general hospital admission in people with dementia: Cohort studyThe British Journal of Psychiatry, 2015
- Medicalisation or under-treatment? Psychotropic medication use by elderly people in New ZealandHealth Sociology Review, 2011
- Burden of Alzheimer's Disease: Population-Based Estimates and Projections for New Zealand, 2006–2031Australian & New Zealand Journal of Psychiatry, 2008
- The Tuscany experimental registry for Alzheimer's disease and other dementias: how many demented people does it capture?Aging Clinical and Experimental Research, 2007