The mean apoB/apoAΙ ratios were significantly higher among the participants with carotid atherosclerosis (0.91 ± 0.02 in men and 0.85 ± 0.03 in women) compared to participants without carotid atherosclerosis (0.85 ± 0.01 in men and 0.75 ± 0.01 in women) (P < 0.05). Here, APOB is linked to carotid atherosclerosis.