Nonlinear association of triglyceride‐glucose body mass index with all‐cause mortality in postmenopausal women, a retrospective cohort study: Evidence from the 2001 to 2014 National Health and nutrition examination survey

In this cohort of US postmenopausal women, TyG-BMI exhibited a U-shaped association with all-cause mortality. Both low and high TyG-BMI values conferred elevated mortality risk, especially from cardiovascular causes, while intermediate TyG-BMI levels were associated with the lowest risk. These findings suggest that maintaining a balanced TyG-BMI, reflecting neither extreme leanness with low metabolic reserves nor excessive insulin-resistant adiposity, might be important for longevity in older women.