Umbilical waist-to-height ratio and trunk fat mass index (DXA) as markers of central adiposity and insulin resistance in Argentinean children with a family history of metabolic syndrome.

Central adiposity is increasing in childhood. To find a simple index of central fatness that accurately predicts insulin resistance we studied 55 obese children and 53 siblings, aged 6-16 years. We recorded the family metabolic score, calculated clinical and DXA-derived fat distribution indexes and HOMA-IR.