Association Between Inflammatory Potential of the Diet and Ulcerative Colitis: A Case-Control Study

Zeinab Khademi1,2, Parvane Saneei3,4, Ammar Hassanzadeh Keshteli5,6, Hamed Daghaghzadeh6, Hamid Tavakkoli6, Peyman Adibi6, Ahmad Esmaillzadeh3,1,7
1Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Iran
2Students' Scientific Research Center, Tehran University of Medical Sciences, Iran
3Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Iran
4Food Security Research Center, Isfahan University of Medical Sciences, Iran
5Department of Medicine, University of Alberta, Canada
6Integrative Functional Gastroenterology Research Center, Isfahan University of Medical Sciences, Iran
7Obesity and Eating Habits Research Center, Endocrinology and Metabolism Molecular -Cellular Sciences Institute, Tehran University of Medical Sciences, Iran

Tóm tắt

Background/Aim:Despite the inflammatory nature of inflammatory bowel disease (IBD), limited data are available on the association of inflammatory potential of the diet and risk of ulcerative colitis (UC). We aimed to investigate the association of inflammatory potential of the diet (IPD) score and odds of UC in a case-control study.Methods:Patients with UC were enrolled from Iranian IBD registry, whose disease was confirmed by a gastroenterologist. Controls were selected randomly from the Study of the Epidemiology of Psycho Alimentary Health and Nutrition (SEPAHAN) study, a large population-based study on more than 8,000 apparently healthy individuals. Dietary intakes of 28 food items obtained from a validated dish-based food frequency questionnaire (FFQ), were used to compute IPD score.Results:This case-control study was carried out among 109 cases and 218 randomly chosen controls. Mean age of cases and controls was 39.5 ± 10.0 and 41.5 ± 11.8 y, respectively. Totally, 52% of study participants were female and 48% were male. After controlling for age, sex, and body mass index (BMI), we found that the patients with UC were more likely to be in the highest quartile of IPD score compared with controls (OR: 2.83; 95% CI: 1.41–5.69,P-trend < 0.001). This association strengthened after additional adjustment for education, smoking, medical history, and physical activity (OR: 3.48; 95% CI: 1.32–9.10,P-trend = 0.003). When we took dietary habits into account, the association was slightly attenuated (OR: 3.33; 95% CI: 1.20–9.20,P-trend = 0.005).Conclusions:We found that adherence to a pro-inflammatory diet was positively associated with greater odds of UC. Further studies are required to confirm these findings.

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