The circulating level of proprotein convertase subtilisin kexin type 9 (PCSK9), which is associated with the severity and outcomes of patients with CAD, has been described as a new risk marker of CAD (Bae et al., 2018; Panahi et al., 2019; Peng et al., 2020; Kajingulu et al., 2022). Here, PCSK9 is linked to coronary artery disorder.