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Br J Nutr. 2019 Jul 25:1-40. doi: 10.1017/S0007114519001843. [Epub ahead of print]

Association between dietary fiber intake and asthma (symptoms and control): results from the French national e-cohort NutriNet-Santé.

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Université Paris 13, Equipe de Recherche en Epidémiologie Nutritionnelle (EREN),Centre de Recherche en Epidémiologie et Statistiques - Université de Paris, Inserm (U1153), Inra (U1125), Cnam, Bobigny,France.
Inserm, U1168, VIMA: Aging and chronic diseases. Epidemiological and public health approaches, F-94807, Villejuif,France.


Despite growing evidence suggesting a potential health benefit of high fiber intake for the prevention of chronic inflammatory diseases, studies regarding the role of total dietary fiber intake, types and sources of fiber on asthma are lacking. This study aimed to investigate the cross-sectional association between dietary fiber intakes, and source of fiber with the asthma symptom score and asthma control. 35,380 participants from the NutriNet-Santé cohort were included. Asthma was defined by the asthma symptom score (continuous) and asthma control by the Asthma Control Test (uncontrolled: ACT≤19). Fiber intakes (grams/day) were categorized according to sex-specific quintiles. Multi-adjusted negative binomial regressions were used to evaluate associations between dietary fiber with the asthma symptom score, and logistic regressions with asthma control. Participants were aged 54 on average (75% women). After adjustment for confounders, higher intakes of total, soluble, insoluble, fibers from cereals, fruit and seeds were significantly negatively associated with the asthma symptom score both among women and men; odds ratios (ORs) for the highest quintile of total dietary fiber compared with the lowest quintile were 0.73 (0.67-0.79) in women, and 0.63 (0.55-0.73) in men. We also found inverse significant associations between total, soluble and insoluble fiber with uncontrolled asthma both among women and men; ORs for participants in the highest quintile of total dietary fiber was 0.72 (0.55-0.95) in women and 0.45 (0.26-0.79) in men.


Dietary fiber; asthma control; asthma symptom score; cereal fiber; fruit fiber; insoluble fiber; mPNNS-GS; soluble fiber; vegetable fiber


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