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Advantages of QRISK2 (2010): the key issue is ethnicity and extent of reallocation
  1. Julia Hippisley-Cox1,
  2. Carol Coupland1,
  3. John Robson2,
  4. Peter Brindle3
  1. 1Division of Primary Care, University of Nottingham, University Park, Nottingham, UK
  2. 2Division of Primary Care, Queen Marys, London, UK
  3. 3NHS Bristol, Bristol, UK
  1. Correspondence to Julia Hippisley-Cox, Division of Primary Care, University of Nottingham, 13th Floor Tower Building, University Park, Nottingham NG2 7RD, UK; julia.hippisley-cox{at}nottingham.ac.uk

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To the Editor In their paper published in this issue of Heart (see page 491), de la Iglesia et al1 describe the performance of ASSIGN and Framingham algorithms in comparison to the original QRISK equations.

Readers may be interested that the QRISK2 algorithm was published in February 20092 and made available as free open source software in April 2010.3 This can be found at http://svn.clinrisk.co.uk/opensource/qrisk2/. The open source is intended to further increase the reliable and widespread implementation of QRISK2 into clinical practice.

There are substantial differences between the original QRISK4 and QRISK25 algorithms which include additional predictor variables together with their associated significant age interactions:

  • —self-assigned ethnicity

  • —rheumatoid arthritis

  • —chronic renal disease

  • —atrial fibrillation.

All these are independent predictors and improve risk estimates in individual patients. Both QRISK and QRISK2 have been independently validated on …

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