Background-Studies on ischemic heart disease (IHD) incidence in individuals with celiac disease (CD) are contradictory and do not take small intestinal pathology into account. Methods and Results-In this Swedish population-based cohort study, we examined the risk of IHD in patients with CD based on small intestinal histopathology. We defined IHD as death or incident disease in myocardial infarction or angina pectoris in Swedish national registers. In 2006 to 2008, we collected duodenal/jejunal biopsy data on CD (equal to villous atrophy; Marsh 3; nϭ28 190 unique individuals) and inflammation without villous atrophy (Marsh 1 to 2; nϭ12 598) from all 28 pathology departments in Sweden. A third cohort consisted of 3658 individuals with normal mucosa but positive CD serology (Marsh 0, latent CD). We found an increased risk of incident IHD in patients undergoing small intestinal biopsy that was independent of small intestinal histopathology
Clinical Perspective on p 490One in 5 deaths in the United States is caused by ischemic heart disease (IHD), 1 and Ϸ500 000 people die of IHD each year in the United States. This makes IHD the leading cause of death for American men and women. 1 Individuals with CD are at increased risk of death, 2 infectious disease, 3 and fractures. 4 However, research findings on IHD are contradictory. Most 2,5-7 but not all 8 -10 studies have shown an increased risk of incident IHD, death resulting from IHD, or cardiovascular disease in CD. These contradictory results may be explained in part by differences in study design, method of data collection, and small sample sizes. The main objective of this study was therefore to examine the risk of IHD in a population-based large cohort of patients with CD.In recent years, there has been a growing interest in CD with only minor mucosal abnormalities (no VA), 11 not fulfilling traditional criteria for CD. 12 Despite this interest, we know of no study on IHD in patients with inflammation without VA or in patients with latent CD (defined by the National Institutes of Health as normal mucosa but positive CD serology). 13 A second objective was therefore to estimate the risk of IHD in patients with inflammation without VA or latent CD.
MethodsIn this cohort study, we estimated the risk of incident IHD (defined as first myocardial infarction [MI] and angina pectoris [AP]) in patients with CD according to small intestinal histopathology and no prior history of IHD. We did so through linkage of nationwide histopathology data with inpatient and mortality data on IHD from Swedish national registers. (Table 1). Data were restricted to computerized biopsy reports; for this reason, most patients in this study had been biopsied after 1990 (Table 1). Data searches were carried out by local information technology technicians who obtained data on arrival date of the biopsies, personal identity number, 15 morphology based on the Swedish SnoMed classification codes, 14 and topography (duodenum or jejunum). We graded morphology as VA (Marsh stage 3 and equal to CD),...