Friedewald (mg/dL): \(\displaystyle \mathrm{LDL\text{-}C} = \mathrm{TC} - \mathrm{HDL\text{-}C} - \frac{\mathrm{TG}}{5}\). NIH Sampson (mg/dL): \(\displaystyle \mathrm{LDL\text{-}C} = \frac{\mathrm{TC}}{0.948} - \frac{\mathrm{HDL\text{-}C}}{0.971} - \left(\frac{\mathrm{TG}}{8.56} + \frac{\mathrm{TG}\times (\mathrm{TC}-\mathrm{HDL\text{-}C})}{2140} - \frac{\mathrm{TG}^2}{16100}\right) - 9.44\). Derived measures: \(\mathrm{non\text{-}HDL\text{-}C} = \mathrm{TC} - \mathrm{HDL\text{-}C}\), \(\mathrm{TC/HDL}\) ratio, \(\mathrm{TG/HDL}\) ratio.