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Development and use of prediction models for classification of cardiovascular risk of remote indigenous Australians

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Tran-Duy, A, McDermott, R, Knight, J, Hua, X, Barr, ELM, Arabena, K, Palmer, AJ ORCID: 0000-0002-9703-7891 and Clarke, PM 2019 , 'Development and use of prediction models for classification of cardiovascular risk of remote indigenous Australians' , Heart Lung and Circulation , pp. 1-10 , doi: 10.1016/j.hlc.2019.02.005.

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Abstract

Background: Cardiovascular disease (CVD) is the leading cause of death for Indigenous Australians. There is widespread belief that current tools have deficiencies for assessing CVD risk in this high-risk population. We sought to develop a 5-year CVD risk score using a wide range of known risk factors to further improve CVD risk prediction in this population.Methods: We used clinical and demographic information on Indigenous people aged between 30 and 74 years without a history of CVD events who participated in the Well Person's Health Check (WPHC), a community-based survey. Baseline assessments were conducted between 1998 and 2000, and data were linked to administrative hospitalisation and death records for identification of CVD events. We used Cox proportional hazard models to estimate the 5-year CVD risk, and the Harrell's c-statistic and the modified Hosmer-Lemeshow (mH-L) χ2 statistic to assess the model discrimination and calibration, respectively.Results: The study sample consisted of 1,583 individuals (48.1% male; mean age 45.0 year). The risk score consisted of sex, age, systolic blood pressure, diabetes mellitus, waist circumference, triglycerides, and albumin creatinine ratio. The bias-corrected c-statistic was 0.72 and the bias-corrected mH-L χ2 statistic was 12.01 (p-value, 0.212), indicating good discrimination and calibration, respectively. Using our risk score, the CVD risk of the Indigenous Australians could be stratified to a greater degree compared to a recalibrated Framingham risk score.Conclusions: A seven-factor risk score could satisfactorily stratify 5-year risk of CVD in an Indigenous Australian cohort. These findings inform future research targeting CVD risk in Indigenous Australians.

Item Type: Article
Authors/Creators:Tran-Duy, A and McDermott, R and Knight, J and Hua, X and Barr, ELM and Arabena, K and Palmer, AJ and Clarke, PM
Keywords: aboriginal, cardiovascular disease, coronary heart disease, prediction model, risk score, Torres Strait Islanders
Journal or Publication Title: Heart Lung and Circulation
Publisher: Elsevier Australia
ISSN: 1443-9506
DOI / ID Number: 10.1016/j.hlc.2019.02.005
Copyright Information:

Copyright 2019 Australian and New Zealand Society of Cardiac and Thoracic Surgeons (ANZSCTS) and the Cardiac Society of Australia and New Zealand (CSANZ). Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) https://creativecommons.org/licenses/by-nc-nd/4.0/

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