Discrimination of metabolically healthy and unhealthy individuals using the triglyceride glucose index – distributional considerations

The triglyceride glucose index (TyG) is a surrogate measure of insulin resistance. It is calculated as Ln(triglycerides in mg/dl x glucose in mg/dl/2) and has been suggested for the identification of “normal weight but metabolic obese” individuals. Assuming that there are two groups, metabolic healthy (MH) and metabolic unhealthy (MUH), the TyG distribution will be a mixture of the distributions within these groups.