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Published on: August 7, 2017
Non-linear relationship between the children's dietary inflammatory index and asthma risk: identifying a critical
Junyu Xu1, Meiping Zhu1, Yi Shi1
1The First Affiliated People's Hospital of Huzhou University, Huzhou, Zhejiang, China.
Insights
Dietary patterns impact childhood asthma. A U-shaped link exists between the Children's Dietary Inflammatory Index (C-DII) and asthma, with optimal risk at a specific C-DII score. Balanced diets may reduce asthma risk.
Area of Science:
- Pediatric respiratory health
- Nutritional science
- Epidemiology
Background:
- Diet significantly influences asthma development and progression in children.
- The Children's Dietary Inflammatory Index (C-DII) quantifies dietary inflammatory potential in youth.
- Higher C-DII scores indicate more pro-inflammatory diets.
Purpose of the Study:
- To investigate the association between the Children's Dietary Inflammatory Index (C-DII) and asthma prevalence in US children and adolescents.
- To explore the non-linear relationship and identify potential thresholds for dietary inflammatory impact on asthma.
Main Methods:
- Utilized data from the National Health and Nutrition Examination Survey (NHANES) 2013-2018 and 2021-2023.
- Calculated C-DII from 24-hour dietary recalls for 6,523 participants aged 6-19 years.
- Employed multivariable logistic regression, smooth curve fitting, and Restricted Cubic Spline analyses to assess the diet-asthma relationship.
Main Results:
- A U-shaped association was observed between C-DII and asthma prevalence, with lowest risk at C-DII score -0.99.
- Asthma prevalence was 18.63% in the study population (median C-DII: -0.026).
- Significant interactions were found for age and ethnicity, with varying associations across subgroups.
Conclusions:
- A significant non-linear relationship exists between dietary inflammatory potential and asthma prevalence in US youth.
- Balanced dietary patterns are crucial for mitigating asthma risk in children and adolescents.
- Further longitudinal research is recommended to confirm findings and elucidate causal mechanisms.
Background:
Asthma, a chronic respiratory disease, is influenced by diet, which plays a key role in its onset and progression. The Children's Dietary Inflammatory Index (C-DII) measures how diets impact inflammation in children and adolescents (6-19 years). The C-DII is a metric that quantifies the inflammatory potential of diet, with higher scores indicating more pro-inflammatory diets and a scoring range from -6.25 to 6.02. This study investigates the association between C-DII and asthma prevalence in US children and adolescents.
Methods:
Data from the National Health and Nutrition Examination Survey (NHANES) 2013-2018 and 2021-2023 were utilized. Data from participants aged 6-19 years who completed dietary interviews and provided asthma-related information was included. The C-DII was calculated using 24-h dietary recall data, and data were categorized into quartiles. Asthma diagnosis was based on self-reported doctor diagnosis and current asthma status. Multivariable logistic regression, smooth curve fitting, threshold benefit analysis, and Restricted Cubic Spline (RCS) analyses were performed to evaluate the relationship between C-DII and asthma prevalence.
Results:
Data from 6,523 children and adolescents aged 6-19 years were analyzed. The median C-DII score was-0.026, and asthma prevalence was 18.63%. A U-shaped relationship was observed between C-DII and asthma prevalence, with the lowest risk at a C-DII score of-0.99. Subgroup analyses revealed variability in the association between C-DII and asthma across demographic groups. Age-based analysis indicated significant interaction (p = 0.047), with the weakest association observed in the 17-19 years age group. Ethnicity showed significant differences, particularly in Mexican-American (OR = 0.83, 95% CI: 0.70-0.97) and Non-Hispanic Black (OR = 1.56, 95% CI: 1.36-1.80) subgroups.
Conclusion:
This study underscores a significant non-linear association between C-DII and asthma prevalence in US children and adolescents, emphasizing the importance of balanced dietary patterns in mitigating asthma risk. Future longitudinal studies are warranted to confirm these findings and explore causal pathways.
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