Title:

A cross-sectional study on the relationship between average dietary fiber intake and perceived stress in college students

Objective: Dietary fiber intake may play a role in psychological wellbeing. The purpose of this study was to examine the relationship between dietary fiber intake and perceived stress scores in college students, ages18-24. Methods: Data were collected between 2012-2018 from undergraduate students at a medium-sized, northeastern university (n= 3251; 68% female). Perceived stress scores were assessed via online questionnaire using Cohen’s Perceived Stress Scale (range 0 to 40). Fiber intake (g/day) was measured via three-day food records and nutrient analysis software (Diet and Wellness+). Body mass index was calculated via measured height and weight. Data are presented as means±SE and frequencies. ANCOVA and Pearson correlations examined group differences and associations, respectively, with gender, age, BMI, smoker status, alcohol use, financial situation, and physical activity serving as covariates. Results: The mean dietary fiber intake was 11.0+0.1g/1000kcal; 21.2% (2.2% male; 19% female) consumed the recommended amount of dietary fiber (>14g/1000kcal). BMI was higher among students that did not meet fiber recommendations compared to those who did (23.6+0.07 vs. 22.7+0.1, p<0.0001). Overall, the mean perceived stress score was 15.8+0.1, a moderate level of perceived stress; a weak, positive correlation (r=0.043, p=0.01) between dietary fiber intake and perceived stress scores was observed. On average, females reported a higher overall perceived stress score compared to males (16.1+0.2 vs.13.5+0.2; p<0.0001). Conclusion: Consistent with other research, we report a low fiber intake among young adults, however, we did not observe a robust relationship between dietary fiber intake and perceived stress. Future research should examine effects of high fiber diets on perceived stress. Funding Source: New Hampshire Agriculture Experiment Station and USDA National Institute of Food and Agriculture Project 1010738.

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