1. Dietary inflammation and childhood adiposity: Analysis of individual participant data from six birth cohorts.
- Author
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Vingrys K, Hébert JR, Chen LW, Crozier S, Duijts L, Harvey NC, Jaddoe VWV, Kelleher C, McAuliffe FM, Polanska K, Suderman M, Jerzynska J, Bottai M, Segurado R, and Phillips CM
- Subjects
- Humans, Female, Child, Male, Child, Preschool, Body Mass Index, Europe epidemiology, Longitudinal Studies, Cohort Studies, Inflammation, Adiposity, Pediatric Obesity epidemiology, Diet statistics & numerical data, Diet methods, Birth Cohort
- Abstract
Background & Aims: Childhood adiposity and inflammation impact long-term health. However, associations between dietary inflammation and childhood adiposity are unclear. We investigated if more pro-inflammatory diets are associated with greater adiposity in early-, mid-, and late-childhood., Methods: We pooled individual participant data (IPD) from 13,978 children in six European birth cohorts in the ALPHABET consortium: Lifeways Cross-Generation Cohort Study (Lifeways), the Randomised cOntrol trial of LOw glycaemic index diet during pregnancy study (ROLO), the Avon Longitudinal Study of Parents and Children (ALSPAC), the Southampton Women's Survey (SWS), the Polish Mother and Child Cohort (REPRO_PL), and The Generation R Study (Generation R). Dietary inflammation was determined using the Children's Dietary Inflammatory Index (C-DII™). Adiposity-related outcomes included BMI z-score (primary outcome), abdominal circumference, skinfolds, fat-mass- and fat-free-mass-indices (secondary outcomes). Two-stage random effects IPD meta-analysis (IPD-MA), with adjusted linear and logistic regression models, was conducted. Quantile regression (QR) examined C-DII associations with BMI z-score percentiles., Results: Median, 25th and 75th percentile C-DII scores trended upwards from early 0.18 (-0.65, 1.03) to late-childhood 0.51 (-0.40, 1.49). Pooled QR revealed positive C-DII associations across BMI z-score percentiles, particularly in late-childhood unadjusted β (95 % CI) 75th (0.075 (0.046, 0.105), p < 0.001); 85th (0.077 (0.045, 0.108), p < 0.001); and 95th (0.051 (0.011, 0.091), p = 0.01). Adjusted cohort-specific QR identified contrasting associations at early-childhood (ALSPAC and SWS) and late-childhood (Generation R). Pooled adjusted IPD-MA showed C-DII associations with late-childhood obesity [OR (95 % CI) 0.89 (0.81, 0.97), p = 0.01]., Conclusions: C-DII associations across BMI z-score distribution varied by cohort, quantile, and time-point, with some potentially explained by adiposity rebound, reverse causation and questionnaire response biases, highlighting insights not evident with linear regression., Competing Interests: Conflict of interest KV, LWC, SC, LD, NCH, VWVJ, CK, FMM, KP, MS, JJ, MB, RS and CMP - no conflict of interest to declare. JH: Dr. James R. Hébert owns controlling interest in Connecting Health Innovations LLC (CHI), a company that has licensed the right to his invention of the dietary inflammatory index (DII) from the University of South Carolina in order to develop computer and smart phone applications for patient counselling and dietary intervention in clinical settings. CHI owns exclusive right to the E-DII and C-DII. The subject matter of this paper has no direct bearing on that work, nor has any CHI-related activity exerted any influence on this project. This did not and will not alter our adherence to the journal policies on sharing data and materials, but note that we are unable to share the computational algorithm, which is protected by trademark and patent law., (Copyright © 2025 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.)
- Published
- 2025
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