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

BMC Geriatrics

Jacqueline M. Quail⁶  Anthea Innes⁴  Dorothy A. Forbes⁹  Vanina Dal Bello-Haas⁷  Norma J. Stewart²  Gary F. Teare⁶  Margaret Crossley^1,10  Andrew Kirk¹  Megan E. O’Connell³  Debra G. Morgan⁸  Julie G. Kosteniuk⁵ 

[1] Division of Neurology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada;College of Nursing, University of Saskatchewan, Saskatoon, SK, Canada;Department of Psychology, University of Saskatchewan, Saskatoon, SK, Canada;Bournemouth University Dementia Institute, Bournemouth University, Dorset, UK;Canadian Centre for Health and Safety in Agriculture, University of Saskatchewan, 104 Clinic Place, Saskatoon S7N 2Z4, SK, Canada;Saskatchewan Health Quality Council, Saskatoon, SK, Canada;School of Rehabilitation Science, McMaster University, Hamilton, ON, Canada;Canadian Centre for Health and Safety in Agriculture, University of Saskatchewan, Saskatoon, SK, Canada;Faculty of Nursing, University of Alberta, Edmonton, AB, Canada;Department of Psychology (Professor Emerita), University of Saskatchewan, Saskatoon, SK, Canada

关键词: Prescription drug;    Long-term care;    Hospital;    Primary care;    Epidemiology;    Incidence;    Prevalence;    Diagnosis;    Alzheimer’s disease;    Dementia;   

Others  :  1218276
DOI  :  10.1186/s12877-015-0075-3

 received in 2014-12-01, accepted in 2015-06-16,  发布年份 2015

【 摘 要 】

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.

【 授权许可】

   
2015 Kosteniuk et al.

【 图 表 】

Fig. 1.

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