Dietary fiber intake is positively related with cognitive function in US older adults. (March 2022) - Sun, Wenjun
Graphical abstract: Highlights: Higher dietary and total fiber intake was significantly positively associated with cognitive function. Fruit fiber intake was positively associated with Digit Symbol Substitution Test (DSST) and animal fluency test score. Vegetable fiber intake was positively associated with DSST, CERAD word learning test and the composite cognition score. No significant interaction effect between gender and fiber intake was found. Abstract: To investigate the association between dietary fiber intake and cognitive function in the US elderly, a cross-sectional study in the National Health and Nutrition Examination Survey was conducted. Higher dietary and total fiber intake were positively associated with the composite cognition score (P for trend < 0.05). Compared with the lowest quartile of fruit fiber intake, the second quartile was positively related with Digit Symbol Substitution Test (DSST) score (β (95% CI): 1.75 (0.11, 3.38)), and the third quartile was positively related with animal fluency test score (β (95% CI): 0.71 (0.02, 1.40)). Vegetable fiber intake was positively associated with DSST, Consortium to Establish a Registry for Alzheimer's disease word learning test and the composite cognition score (β (95% CI) for the highest quartile was 2.44 (0.42, 4.47), 1.47 (0.50, 2.44), and 0.15 (0.05, 0.26), respectively). No significant interaction effect between gender and fiber intake was found.