Association between dietary inflammatory index and energy-adjusted dietary inflammatory index and constipation in US adults

Abstract

Abstract Background Diet and inflammation are associated with constipation. Dietary inflammation index (DII) and energy-dietary inflammation index (E-DII) have not been evaluated together with constipation. Therefore, this study was conducted to further observe the relationship between DII and E-DII and constipation in American adults. Methods Data were extracted from the National Health and Nutrition Examination Survey (NHANES) for 12,400 adults aged 20 years and older between 2005 and 2010. DII and E-DII were obtained by employing data from the two 24-h dietary recall of the participants. Constipation was defined and categorized using the Bristol Stool Form Scale. Results In the logistic regression model, the relationship between DII and E-DII and constipation remained positive after adjusting for confounding factors (odds ratio [OR] = 1.13; 95% confidence interval [CI]: 1.07–1.20 in DII logistic regression model III; odds ratio [OR] = 1.09; 95% confidence interval [CI]: 1.03–1.17 in E-DII logistic regression model III). Constipation was more common in quartile 4 (DII: 2.87—5.09; E-DII: 1.78—8.95) than in quartile 1 (DII: -5.11—0.25; E-DII: -2.60—0.11) (OR = 1.79, 95% CI: 1.30–2.47 in DII and OR = 1.75, 95% CI: 1.25–2.46 in E-DII for all participants; OR = 2.04, 95% CI: 1.39–3.00 in DII OR = 2.20, 95% CI: 1.39–3.47 in E-DII for males; OR = 1.86, 95% CI: 1.08–3.22 and OR = 1.80, 95% CI: 1.06–3.06 for females). These results were confirmed using multiple imputations. Conclusions The findings of this study show that a high DII and E-DII were associated with an increased incidence of constipation among US adults.

Keywords

• Stool consistency
• DII
• E-DII
• Constipation
• NHANES
• Bristol stool form scale