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Changing trends in coding for depression among the UK inflammatory bowel disease population
  1. Jonathan Blackwell1,
  2. Sonia Saxena2,
  3. Richard C Pollok3
  1. 1Gastroenterology, St George’s NHS Foundation Trust, London, UK
  2. 2Primary Care and Public Health, Imperial College, London, UK
  3. 3Gastroenterology, St George’s Hospital, London, UK
  1. Correspondence to Dr Jonathan Blackwell, Gastroenterology, St George’s NHS Foundation Trust, London SW170QT, UK; jonnyblackwell{at}gmail.com

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We read with interest the findings of Frolkis et al and welcome the contribution to this challenging field of research.1 An important consideration in the methodology used is the case definition of incident depression, defined as any patient with a code for a depressive disorder in The Health Improvement Network (THIN) database between 1986 and 2012. The authors acknowledge …

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