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Changing trends in coding for depression among the UK IBD population: reply from authors
  1. Isabelle Vallerand,
  2. Alexandra D Frolkis,
  3. Scott Patten,
  4. Gilaad G Kaplan
  1. Medicine and Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
  1. Correspondence to Dr Gilaad G Kaplan, Medicine and Community Health Sciences, University of Calgary, Alberta, T2N 4Z6, Canada; ggkaplan{at}

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We thank Blackwell et al 1 for raising an important question about the classification of depression in a population of IBD patients in the UK. In our study,examining depression as a risk factor for the development of IBD,2 we chose to use a more restrictive case definition of depression based closely on a definition of major depressive disorder (MDD) as a clinically significant form of depression recognised in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5)3 and known to be associated with a significant degree of morbidity and mortality.4 5 In …

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  • Contributors All authors wrote the letter together.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; internally peer reviewed.

  • Patient consent for publication Not required.

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