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We have found the article by Rungoe et al about ischaemic heart disease (IHD) in inflammatory bowel disease (IBD) patients to be quite interesting since there are not many studies on this topic and they are mainly retrospective.1
As reported by the Authors, the high incidence of IHD observed in patients with IBD during the first year is probably due to bias, as considered in the study by Yarur et al in which heart disease cases in the 12 months following the diagnosis of IBD were excluded.2
The same methodological problem appears in the years following the first diagnosis of IBD, because these patients are more closely studied compared to the control general population.
Rungoe's table 2 does not show the concordance between Crohn's …
Contributors PS and BS have contributed to this letter to the editor.
Competing interests None.
Provenance and peer review Not commissioned; internally peer reviewed.