Calibration and discrimination of the Framingham Risk Score and the Pooled Cohort Equations
Dennis T. KoSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, Alta. [email protected]Atul SivaswamySchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaManeesh SudSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaGynter KotrriSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaPaymon AziziSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaMaria KohSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaPeter C. AustinSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaDouglas S. LeeSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaIdan RoifmanSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaGeorge ThanassoulisSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaKaren TuSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaJacob A. UdellSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaHarindra C. WijeysunderaSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, AltaTodd J. AndersonSchulich Heart Centre (Ko, Sud, Roifman, Wijeysundera), Sunnybrook Health Sciences Centre; ICES (Ko, Sivaswamy, Sud, Kotrri, Azizi, Koh, Austin, Lee, Roifman, Udell, Wijeysundera); Institute of Health Policy, Management and Evaluation (Ko, Azizi, Austin, Lee, Roifman, Tu, Udell, Wijeysundera), University of Toronto; University Health Network (Lee, Tu), Toronto, Ont.; Department of Medicine (Thanassoulis), McGill University; McGill University Health Centre (Thanassoulis), Montréal, Que.; North York General Hospital (Tu), Department of Family and Community Medicine, University of Toronto; Women's College Research Institute (Udell), Toronto, Ont.; Libin Cardiovascular Institute of Alberta (Anderson); Cumming School of Medicine (Anderson), University of Calgary, Alta
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Аннотация
BACKGROUND: Although accurate risk prediction is essential in guiding treatment decisions in primary prevention of atherosclerotic cardiovascular disease, the accuracy of the Framingham Risk Score (recommended by a Canadian guideline) and the Pooled Cohort Equations (recommended by US guidelines) has not been assessed in a large contemporary Canadian population. Our primary objective was to assess the calibration and discrimination of the Framingham Risk Score and Pooled Cohort Equations in Ontario, Canada. METHODS: We conducted an observational study involving Ontario residents aged 40 to 79 years, without a history of atherosclerotic cardiovascular disease, who underwent cholesterol testing and blood pressure measurement from Jan. 1, 2010, to Dec. 31, 2014. We compared predicted event rates generated by the Framingham Risk Score and the Pooled Cohort Equations with observed event rates at 5 years using linkages from validated administrative databases. RESULTS: Our study cohort included 84 617 individuals (mean age 56.3 yr, 56.9% female). Over a maximum follow-up period of 5 years, we observed 2162 (2.6%) events according to the outcome definition of the Framingham Risk Score, and 1224 (1.4%) events according to the outcome definition of the Pooled Cohort Equations. The predicted event rate of 5.78% by the Framingham Risk Score and 3.51% by the Pooled Cohort Equations at 5 years overestimated observed event rates by 101% and 115%, respectively. The degree of overestimation differed by age and ethnicity. The C statistics for the Framingham Risk Score (0.74) and Pooled Cohort Equations (0.73) were similar. INTERPRETATION: The Framingham Risk Score and Pooled Cohort Equations significantly overpredicted the actual risks of atherosclerotic cardiovascular disease events in a large population from Ontario. Our finding suggests the need for further refinement of cardiovascular disease risk prediction scores to suit the characteristics of a multiethnic Canadian population.
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