Dynamic association between triglyceride-glucose-body mass index and hospital mortality in critically ill patients with heart failure: a multicenter retrospective cohort study

TYG-BMI demonstrates a reproducible, U-shaped association with hospital mortality in critically ill HF patients. Both intensity and exposure duration contribute to risk stratification, though prospective validation is warranted given the observational design and uncertain physiological specificity of TYG-BMI in the ICU setting.