Association between triglyceride-glucose-body mass index and adverse prognosis in elderly patients with severe heart failure and type 2 diabetes: a retrospective study based on the MIMIC-IV database

Lower TyG-BMI independently predicted increased short-, intermediate-, and long-term mortality in elderly patients with severe HF and T2DM. This composite index-integrating metabolic (TyG) and nutritional (BMI) dimensions-provides practical risk stratification, particularly within identified threshold ranges.