A population-based dietary inflammatory index predicts levels of C-reactive protein in the Seasonal Variation of Blood Cholesterol Study (SEASONS). Issue 8 (10th October 2013)

• Record Type: Journal Article
• Authors: Shivappa, Nitin; Steck, Susan E; Hurley, Thomas G; Hussey, James R; Ma, Yunsheng; Ockene, Ira S; Tabung, Fred; Hébert, James R
• Is Part Of: Public health nutrition. Volume 17:Issue 8(2014)
• Page Start: 1825
• Page End: 1833
• Publication Date: 2013-10-10
• Subjects: Diet, -- Inflammation, -- C-reactive protein, -- Adults, -- Predictive ability; Nutrition -- Periodicals; Nutrition policy -- Periodicals; Public health -- Periodicals; 613.2
• DOI: 10.1017/S1368980013002565
• Languages: English
• ISSNs: 1368-9800

Abstract

Abstract: Objective: To perform construct validation of the population-based Dietary Inflammatory Index (DII) using dietary data from two different dietary assessments and serum high-sensitivity C-reactive protein (hs-CRP) as the construct validator. Design: Using data derived from (i) three 24 h dietary recalls (24HR) at baseline and at the end of each subsequent quarter (i.e. up to fifteen over a year) and (ii) a 7 d dietary recall (7DDR) measured at baseline and then quarterly, regression analyses were conducted to test the effect of the DII score on serum hs-CRP as dichotomous (≤3 mg/l, >3 mg/l), while controlling for important potential confounders. Setting: Existing data from the Seasonal Variation of Blood Cholesterol Study (SEASONS), a longitudinal observational study of healthy participants recruited in Worcester, MA, USA and participants were followed for 1 year. Subjects: Participants who had at least one hs-CRP measurement over her/his 1-year participation ( n 495 for 24HR, n 559 for 7DDR). Results: Higher DII scores were associated with values of hs-CRP >3 mg/l (OR = 1·08; 95 % CI 1·01, 1·16, P = 0·035 for the 24HR; and OR = 1·10; 95 % CI 1·02, 1·19, P = 0·015 for the 7DDR). Conclusions: The population-based DII was associated with interval changes in hs-CRP using both the 24HR and 7DDR. The success of this first-of-a-kind attempt at relating individuals' intakes of inflammation-modulating foods using this refined DII, and the finding that there is virtually no drop-off in predictive capability using a structured questionnaire in comparison to the 24HR standard, sets the stage for use of the DII in a wide variety of other epidemiological and clinical studies.