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To the Editor: Tillin et al recently reported a cohort study1 comparing the performance of QRISK2 and Framingham in the Southall and Brent cohort in London. We have a number of comments on the study and the interpretation of results.
Number of events. The main problem with the paper is that numbers are very small and given the resulting wide CIs the authors have overstated their findings. There is no information on how many patients had the outcome in the different ethnic groups, but there were only 78 events in …
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