LBDLDL // LDL-Cholesterol, Friedewald equation (mg/dL). LBDLDL = (LBXTC-(LBDHDD + LBXTR/5), round to 0 decimal places) for LBXTR less than 400 mg/dL, and missing for LBXTR greater than 400 mg/dL. LBDHDD from public release file HDL_J