Utilizing harmonization and common surveillance methods to consolidate 4 cohorts: the Western Alaska Tribal Collaborative for Health (WATCH) study.

MedStar author(s):
Citation: International Journal of Circumpolar Health. 72, 2013.PMID: 23671836Institution: MedStar Health Research InstituteForm of publication: Journal ArticleMedline article type(s): Journal Article | Research Support, American Recovery and Reinvestment Act | Research Support, N.I.H., Extramural | Research Support, Non-U.S. Gov'tSubject headings: *Cardiovascular Diseases/eh [Ethnology] | *Diabetes Mellitus/eh [Ethnology] | *Health Surveys/sn [Statistics & Numerical Data] | *Inuits | *Sentinel Surveillance | Adolescent | Adult | Aged | Aged, 80 and over | Alaska/ep [Epidemiology] | Arctic Regions/ep [Epidemiology] | Chronic Disease | Cohort Studies | Databases, Factual | Female | Humans | Incidence | Male | Middle Aged | Risk Factors | Rural Population/sn [Statistics & Numerical Data] | Young AdultYear: 2013Local holdings: Available online through MWHC library: 2002 - presentISSN:
  • 1239-9736
Name of journal: International journal of circumpolar healthAbstract: BACKGROUND: According to health status reports, chronic disease prevalence appears to be rising in western Alaska Native (AN) people, and accurate population-based data are needed. Four cohort studies of western AN people were conducted in the Norton Sound and Yukon-Kuskokwim regions, but none have been large enough to allow reliable estimates of rates of chronic diseases and evaluate their risk factors.CONCLUSIONS: The combined cohort provides statistical power to examine incidence rates and risk factors for CVD and diabetes and allows for analyses by geographic region. The data can be used to develop intervention programmes in these populations and others.DESIGN: Tribal permission was obtained for each cohort study and the consolidated study. Data from baseline exams were directly combined or harmonized into new variables. Common surveillance methods were developed and implemented to identify incidence and risk factors for cardiovascular disease (CVD) events and type 2 diabetes.OBJECTIVE: In this article, the methods used to combine 4 major cohort studies of rural western AN people are described and the benefits and challenges encountered in combining data and standardizing surveillance methods for these studies are discussed.RESULTS: A cohort of 4,569 western AN participants (2,116 men and 2,453 women), aged 18-95 years, was established to study CVD and diabetes prevalence. Prospective surveillance data over an average 6.7-year follow-up can now be used to study CVD and diabetes incidence and associated risk factors in a subset of 2,754 western AN participants (1,218 men and 1,536 women) who consented to initial surveillance.All authors: Austin MA, Boyer BB, Ebbesson SO, Hopkins SE, Howard BV, Jolly SE, Kaufmann C, Koller KR, Metzger JS, Umans JG, Wolfe AWFiscal year: FY2014Digital Object Identifier: Date added to catalog: 2014-02-24
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Item type Current library Collection Call number Status Date due Barcode
Journal Article MedStar Authors Catalog Article 23671836 Available 23671836

Available online through MWHC library: 2002 - present

BACKGROUND: According to health status reports, chronic disease prevalence appears to be rising in western Alaska Native (AN) people, and accurate population-based data are needed. Four cohort studies of western AN people were conducted in the Norton Sound and Yukon-Kuskokwim regions, but none have been large enough to allow reliable estimates of rates of chronic diseases and evaluate their risk factors.

CONCLUSIONS: The combined cohort provides statistical power to examine incidence rates and risk factors for CVD and diabetes and allows for analyses by geographic region. The data can be used to develop intervention programmes in these populations and others.

DESIGN: Tribal permission was obtained for each cohort study and the consolidated study. Data from baseline exams were directly combined or harmonized into new variables. Common surveillance methods were developed and implemented to identify incidence and risk factors for cardiovascular disease (CVD) events and type 2 diabetes.

OBJECTIVE: In this article, the methods used to combine 4 major cohort studies of rural western AN people are described and the benefits and challenges encountered in combining data and standardizing surveillance methods for these studies are discussed.

RESULTS: A cohort of 4,569 western AN participants (2,116 men and 2,453 women), aged 18-95 years, was established to study CVD and diabetes prevalence. Prospective surveillance data over an average 6.7-year follow-up can now be used to study CVD and diabetes incidence and associated risk factors in a subset of 2,754 western AN participants (1,218 men and 1,536 women) who consented to initial surveillance.

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