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Cross-sectional study validates CUN-BAE for body fat assessment, suggesting complementary use with BMI.
Background/Objectives: This cross-sectional study aimed to validate the Clínica Universidad de Navarra-Body Adiposity Estimator (CUN-BAE) against bioelectrical impedance analysis (BIA) in 204 adults. Methods: We evaluated CUN-BAE and body mass index (BMI) as continuous predictors of body fat percentage, total fat mass, and visceral fat. Results: BMI showed stronger correlations with visceral fat (r = 0.941 vs. 0.850) and total fat mass (r = 0.968 vs. 0.828),while CUN-BAE showed a slightly stronger correlation with body fat percentage (r = 0.918 vs. 0.884), the parameter it was designed to estimate. CUN-BAE displayed only a weak correlation with muscle mass (r = 0.153), supporting its specificity for adiposity assessment, whereas BMI showed a moderate correlation with muscle mass (r = 0.551), reflecting its weight-dependent nature. Conclusions: Overall, BMI remains a practical marker of absolute fat mass and visceral adiposity, while CUN-BAE may provide a more refined estimate of relative body fat percentage. Tool selection should be guided by the clinical objective and interpreted as complementary rather than competing measures.
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Palacios et al. (2026) studied this question.
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