LBDLDLN // LBDLDLN = (LBXTC/0.948 – LBDHDD/0.971 – (LBXTR/8.56 + (LBXTR * (LBXTC – LBDHDD))/2140 – LBXTR^2/16100) – 9.44), round 0 decimal places) for LBXTR less than 800 mg/dL, and missing for LBXTR GE 800 mg/dL. ^2 stands for power=2, or squared. LBDHDD from public release file HDL_J