Diet quality and markers of endothelial function: The CARDIA study

Background and aimDietary patterns are associated cross-sectionally with cellular adhesion molecules (CAMs). We studied prospective associations of three dietary patterns with CAMs.Methods and resultsIn the Coronary Artery Risk Development in Young Adults (CARDIA) study, diet was assessed at years 0 (1985–86) and 7 (1992–93) examinations. Four circulating CAMs (E-selectin, P-selectin, soluble intercellular adhesion molecule 1 (sICAM-1), and vascular cellular adhesion molecule (VCAM)) were assayed at years 7 and 15 (2000–01). We created one index score “A Priori Diet Quality Score” and derived dietary patterns using principal components analysis (PCA). Multivariable linear regression models predicted year 15 CAMs from averaged (year 0/7) dietary patterns. The A Priori Diet Quality Score rated 46 food groups beneficial, neutral or adverse based on hypothesized health effects. We derived two PCA dietary patterns: “fruit and vegetables (FV)” (high intakes of fruit, vegetables, and whole grains) and “meat” (high intakes of red meat, refined grain, and butter). All dietary patterns were related to E-selectin and sICAM-1. P-selectin was not related to the FV dietary pattern. VCAM was only related to the A Priori Diet Quality Score. Strongest associations were for the meat dietary pattern with E-selectin (effect size 28% of an SD (+3.9/13.7 ng/mL)) and P-selectin (effect size 37% of an SD (+4.1/11.2 ng/mL)) and the A Priori Diet Quality Score with sICAM-1 (effect size 34% of an SD (−15.1/44.7 ng/mL)) and VCAM (effect size of 26% of an SD (−45.1/170.3 ng/mL)).ConclusionThis prospective analysis suggests that dietary patterns are associated with CAMs.