ArticleInternational journal of ophthalmology2026
Lifestyle behaviors, serum metabolites and high myopia: Mendelian randomization and mediation analysis.
Article in International journal of ophthalmology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
aimTo explore the causal relationship between several possible behavioral factors and high myopia (HM) using multivariable Mendelian randomization (MVMR) approach and to find the mediators among them with mediation analysis.
methodsThe causal effects of several behavioral factors, including screen time, education time, time spent outdoors, and physical activity, on the risk of HM using univariable Mendelian randomization (MR) and MVMR analyses were first assessed. Genome-wide association study summary statistics of serum metabolites were also used in mediation analysis to determine the extent to which serum metabolites mediate the effects of behavioral factors on HM.
resultsMR analyses indicated that both increased time spent outdoors and a higher frequency of moderate physical activity significantly reduced the risk of HM. Further MVMR analysis confirmed that moderate physical activity independently contributed to a lower risk of HM. Additionally, MR analyses identified 13 serum metabolites significantly associated with HM, of which 12 were lipids and one was an amino acid derivative. Mediation analysis revealed that six lipid metabolites mediated the protective effects of moderate physical activity on HM, with the highest mediation proportion observed for 1-(1-enyl-palmitoyl)-GPC (p-16:0; 30.83%).
conclusionThis study suggests that in addition to outdoor time, moderate physical activity habits may have an independent protective effect against HM and pointed to lipid metabolites as priority targets for the prevention due to low physical activity. These results emphasize the importance of physical activity and metabolic health in HM and underscore the need for further study of these complex associations.
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