Equivalence between tests. Left panel: plots of untransformed values of log[triglycerides (TG)] (X axis) vs. TG-rich lipoprotein cholesterol (TRL-C) (Y axis). Right panel: plots of log[TG]/high-density lipoprotein cholesterol (HDL-C) (X axis) vs. TRL-C/apolipoprotein (apo) A-I (Y axis). The equations of the two unbiased lines of equivalence relating each pair of measurements are provided on the graphs. All values obtained from the means of nonfasting values measured on two different days in 120 patients with type 2 diabetes mellitus.