ArticleFrontiers in endocrinology2026
Association of the fibrosis-4 index with prevalent diabetes among adults: a cross-sectional analysis of NHANES 2003-2018 and a Chinese hospital-based health examination population.
Article in Frontiers in endocrinology, 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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Abstract
Background: The fibrosis-4 (FIB-4) index incorporates age, aminotransferases, and platelet count and is widely used for liver fibrosis risk stratification. Because age is part of its formula and strongly associated with diabetes, apparent associations between FIB-4 and prevalent diabetes may reflect age-related confounding rather than an independent hepatic signal. Methods: We conducted a cross-sectional analysis of 35,213 adults from NHANES 2003-2018 and 32,456 adults from a hospital-based health examination population in Hainan, China (2022-2025). Survey-weighted and conventional multivariable logistic regression evaluated FIB-4 continuously and by tertiles. Additional analyses assessed nonlinear associations, age parameterization, collinearity, liver-related exclusions, age-free liver indices, and incremental model performance. Results: In age-group-adjusted NHANES models, each 1-unit increase in FIB-4 was associated with higher odds of prevalent diabetes (OR, 1.13; 95% CI, 1.06-1.22). After replacing age categories with continuous age, this association was attenuated and no longer significant (OR, 1.03; 95% CI, 0.95-1.12; Conclusions: The association between FIB-4 and prevalent diabetes was sensitive to age modeling and differed across datasets. FIB-4 provided little incremental model performance beyond traditional diabetes predictors. These cross-sectional findings do not support FIB-4 as an independent screening, diagnostic, or predictive tool for diabetes.
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