APOA1 and carotid atherosclerosis: Additionally, a study on 5822 Chinese individuals diagnosed with metabolic syndrome found a progressive increase in carotid intima‐media thickness across quartiles of the non‐HDL‐C/HDL‐C ratio, with no significant differences observed between the apoB/apoA1 ratio and non‐HDL‐C/HDL‐C ratio in predicting carotid atherosclerosis.28