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Incidence and prevalence of dementia in linked administrative health data in Saskatchewan, Canada: A retrospective cohort study Open Access

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Author or creator
Kosteniuk, Julie G.
Morgan, Debra G.
O’Connell, Megan E.
Kirk, Andrew
Crossley, Margaret
Teare, Gary F.
Stewart, Norma J.
Bello-Haas, Vanina Dal
Forbes, Dorothy A.
Innes, Anthea
Quail, Jacqueline M.
Additional contributors
Subject/Keyword
Long-term care
Prescription drug
Dementia
Primary care
Hospital
Alzheimer’s disease
Prevalence
Diagnosis
Incidence
Epidemiology
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Background Determining the epidemiology of dementia among the population as a whole in specific jurisdictions – including the long-term care population–is essential to providing appropriate care. The objectives of this study were to use linked administrative databases in the province of Saskatchewan to determine the 12-month incidence and prevalence of dementia for the 2012/13 period (1) among individuals aged 45 and older in the province of Saskatchewan, (2) according to age group and sex, and (3) according to diagnosis code and other case definition criteria. Methods We used a population-based retrospective cohort study design and extracted data from 10 provincial health databases linked by a unique health services number. The cohort included individuals 45 years and older at first identification of dementia between April 1, 2001 and March 31, 2013 based on case definitions met within any one of four administrative health databases (Hospital Discharge Abstracts, Physician Service Claims, Prescription Drug, and RAI-MDS, i.e., Long-term Care). Results A total of 3,270 incident cases of dementia (7.28 per 1,000 PAR) and 13,012 prevalent cases (28.16 per 1,000 PAR) were identified during 2012/13. This study found the incidence rate increased by 2.8 to 5.1 times and the prevalence rate increased by 2.6 to 4.6 times every 10 years after 45 years of age. Overall, the age-standardised incidence rate was significantly lower among females than males (7.04 vs. 7.65 per 1,000 PAR) and the age-standardised prevalence rate was significantly higher among females than males (28.92 vs. 26.53 per 1,000 PAR). Over one-quarter (28 %) of all incident cases were admitted to long-term care before a diagnosis was formally recorded in physician or hospital data, and nearly two-thirds of these cases were identified at admission with impairment at the moderate to very severe level or a disease category of Alzheimer’s disease/other dementia. Conclusions Linking multiple sources of registry data contributes to our understanding of the epidemiology of dementia across multiple segments of the population, inclusive of individuals residing in long-term care. This information is foundational for public awareness and policy recommendations, health promotion and prevention strategies, appropriate health resource planning, and research priorities.
Date created
2015
DOI
doi:10.7939/R3FQ9Q63C
License information
Rights
© 2015 Kosteniuk et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
Citation for previous publication
Kosteniuk, J. G., Morgan, D. G., O'Connell, M. E., Kirk, A., Crossley, M., Teare, G. F., Stewart, N. J., Bello-Haas, V. D., Forbes, D., Innes, A., & Quail, J. M. 2015. Incidence and prevalence of dementia in linked administrative health data in Saskatchewan, Canada: A retrospective cohort study. BMC Geriatrics, 15(1), 73-015-0075-3. dx.doi.org/10.1186/s12877-015-0075-3
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File title: Abstract
File title: Incidence and prevalence of dementia in linked administrative health data in Saskatchewan, Canada: a retrospective cohort study
File author: Julie G. Kosteniuk
Page count: 16
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