Estimation of body fat mass using the CUN-BAE index and mortality risk by sex in the Asturias Study cohort

Abstract Introduction and objectives In epidemiological studies, excess body fat (BF) has been associated with cardiometabolic risk factors, some types of cancer, and other causes of death. A new anthropometric method has been defined: The CUN-BAE index (University of Navarra Clinic-Body Fat Estimator), which is based on BMI, sex, and age. BMI and CUN-BAE index were used to assess their contribution to mortality risk from any cause in the Asturias Study cohort. Material and methods The Asturias Study is a cohort study including 1.034 individuals aged 30–75 years who participated in the first study phase (1998–1999). The study included a clinical survey, physical examination, and an oral glucose tolerance test. Vital status was determined in the cohort after 18 years of follow-up. Results Two hundred and four subjects died: 93 females and 111 males (16.6% females and 23.5% males). Baseline values of both BMI and %BF suggesting obesity (BMI > 30 kg/m2 and CUN-BAE >25% in males and >35% in females) were found in most subjects. After adjusting for T2DM, HBP, CVD, and tobacco, the risk of all-cause and cardiovascular mortality was significantly higher as CUN-BAE increased, especially in females. Conclusions The CUN-BAE equation is a useful tool, especially in females, to detect those who will have a greater risk of mortality, regardless of cardiovascular risk factors.