using data from over 10 000 men , women , and children who participated in the lipid research clinics prevalence studies , we have examined the formula adopted by friedewald et al for estimating plasma or serum concentrations of low-density lipoprotein cholesterol ( ldl-c ) when ( for economy , or in the absence of an ultracentrifuge ) only fasting total cholesterol ( tc ) , high-density lipoprotein cholesterol ( hdl-c ) , and triglyceride ( tg ) concentrations are measured in milligrams per liter , ie , ldl-c = tc- ( hdl-c + 0.20 x tg ) .
C0023822
high-density lipoprotein
C0008377
hdl-c