Dietary fiber intake is positively related with cognitive function in US older adults
Wenjun Sun, Suyun Li, Chen Chen, Zhonghai Lu, Dongfeng Zhang
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.