Epidemiology and Dietary Factors in Glioma Risk
Summary
Gliomas are primary brain tumours arising from glial cells and represent a significant cause of morbidity and mortality worldwide. Incidence varies by geographic region, age group and sex, with higher rates typically observed in North America and Europe and in older adults. While high‐dose ionising radiation and rare genetic syndromes account for a small fraction of cases, modifiable lifestyle factors have been intensively investigated. Among these, diet has emerged as a potential influence on risk, with research focusing on overall dietary patterns rather than single nutrients. Evidence suggests that diets rich in fruits, vegetables, plant‐based fibres and certain proteins may confer protection, whereas Westernised diets high in processed meats and refined carbohydrates might increase predisposition. Mechanistic hypotheses include modulation of oxidative stress, inflammation and cellular proliferation via bioactive compounds, antioxidants and pro‐inflammatory mediators. Methodological challenges—such as recall bias in retrospective studies, heterogeneity of dietary assessment tools and confounding by socioeconomic factors—have driven a shift towards large prospective cohorts and pooled analyses. Improved characterisation of diet–gene interactions and culturally tailored dietary indices promises to refine our understanding of how nutrition can contribute to glioma prevention strategies on a global scale.
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Epidemiology and Dietary Factors in Glioma Risk publication trend
The graph below shows the total number of articles in epidemiology and dietary factors in glioma risk across all publications each year (not limited to Nature Index journals).
Technical terms
Epidemiology: The study of disease occurrence and distribution in populations, and the factors that influence it.
Glioma: A type of primary brain tumour originating from glial cells in the central nervous system.
Case–control study: An observational design comparing exposures in individuals with the disease (cases) to those without (controls).
Odds ratio (OR): A measure of association indicating the odds of exposure among cases relative to controls.
Dietary pattern: The overall combination and variety of foods and nutrients habitually consumed.
Food Frequency Questionnaire (FFQ): A self‐administered tool that assesses usual dietary intake over a specified period.
Systematic review: A structured summary of all available evidence on a topic, following predefined criteria.
Meta‐analysis: A statistical technique that combines results from multiple studies to estimate overall effect sizes.
Dietary Inflammatory Index (DII): A metric quantifying the inflammatory potential of an individual’s diet based on nutrient intake.
Dietary Antioxidant Index (DAI): A composite score reflecting the antioxidant capacity of the diet, based on key vitamins and phytonutrients.
References
- Dietary patterns in relation to glioma: a case–control study. Cancer & Metabolism (2024).
- Healthy dietary patterns, foods, and risk of glioma: A systematic review and meta-analysis of observational studies. Frontiers in Nutrition (2023).
- Chinese Dietary Indices and Glioma: New Insights of a Case–Control Study in the Chinese Population. Nutrients (2023).
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