APOB and coronary artery disorder: In addition, a statistically significant increase in ApoB, TC, LDL-C, Lp(a), sdLDL-C, and PCSK9 levels [554.62 (265.11) ng/ml vs. 496.86 (129.05) ng/ml, p < 0.001] was observed, whereas ApoA1 and HDL-C levels decreased in the CHD group.