Diabetes Mellitus / Low Lean Mass Obesity · Journal article
Journal of Diabetes and Metabolic Disorders · July 27, 2026
Reinforces what was already believed, rather than introducing something new.
Among U.S. adults aged 20–59 years with diabetes in NHANES 2011–2018, the Geriatric Nutritional Risk Index (GNRI) was inversely associated with DXA-defined low-lean-mass obesity (OR 0.74 per 1-SD increase), whereas Prognostic Nutritional Index and Controlling Nutritional Status score were not. However, GNRI's association was attenuated to null after adjustment for body-size measures, suggesting the association reflects body-size overlap rather than independent nutritional status.
Cross-sectional analysis of nationally representative survey data. U.S. adults aged 20–59 years with diabetes; initial sample 1,130 participants, reduced to 1,049 in fully adjusted model due to missing poverty-income ratio data.. Intervention: Nutritional risk scores (GNRI, PNI, CONUT) analysed as exposures. Compared with: Comparison across quartiles of each score; also comparison between three different nutritional risk indices. n = 1,049. United States (NHANES).
Each 1-standard deviation increase in GNRI was associated with lower odds of low-lean-mass obesity phenotype (OR 0.74, 95% CI 0.57–0.96; P = 0.026) PNI and CONUT were not significantly associated with phenotype and showed no consistent quartile dose-response patterns GNRI association remained inverse when obesity defined by waist circumference or DXA body-fat percentage, but attenuated to null after adjustment for BMI or waist circumference
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GNRI may identify individuals with low-lean-mass obesity in diabetes, but clinicians should recognize its association reflects body-size measures rather than independent nutritional status. The attenuation of association after body-size adjustment suggests GNRI should not be interpreted as a standalone nutritional marker independent of adiposity.
Cross-sectional analysis of existing survey data showing GNRI's association with low-lean-mass obesity in diabetes, with moderate evidence strength but important limitations in causal inference and generalizability.
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GNRI may identify individuals with low-lean-mass obesity in diabetes, but clinicians should recognize its association reflects body-size measures rather than independent nutritional status. The attenuation of association after body-size adjustment suggests GNRI should not be interpreted as a standalone nutritional marker independent of adiposity.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
Background. Low muscle reserve combined with excess adiposity is clinically relevant in diabetes, but whether laboratory-based nutritional risk scores differ in their associations with this phenotype remains unclear.Methods. This cross-sectional NHANES 2011-2018 analysis included U.S. adults aged 20-59 years with diabetes. The primary outcome was a DXA-defined low-lean-mass obesity phenotype, defined as low appendicular lean mass adjusted for body mass index combined with BMI-defined obesity. The Geriatric Nutritional Risk Index (GNRI), Prognostic Nutritional Index (PNI), and Controlling Nutritional Status (CONUT) score were analyzed as standardized continuous variables and quartiles using survey-weighted logistic regression.Results. Among 1,130 participants, 97 met the phenotype definition. Because poverty-income ratio was missing in 81 participants, 1,049 participants with 87 events contributed to the fully adjusted model. Each 1-standard deviation increase in GNRI was associated with lower odds of the phenotype (OR 0.74, 95% CI 0.57-0.96; P = 0.026), whereas PNI and CONUT were not significantly associated and showed no consistent quartile dose-response patterns. The GNRI association remained inverse when obesity was defined by waist circumference or DXA body-fat percentage, but was attenuated to the null after adjustment for BMI or waist circumference.Conclusions. GNRI was more consistently associated with the phenotype than PNI or CONUT. However, attenuation after body-size adjustment and component analyses suggest body-size-related construct overlap. GNRI should be interpreted as a composite albumin/body-size marker rather than an independent nutritional indicator.Supplementary information. The online version contains supplementary material available at 10.1007/s40200-026-02028-w.
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