Abstract
BackgroundThe relationship between low‐density lipoprotein cholesterol (LDL‐C) and atherosclerotic cardiovascular disease (ASCVD) according to age remains undetermined. Thus, this study aimed to investigate the age‐related association of LDL‐C and ASCVD.Methods and ResultsData from the Korean NHIS‐HEALS (National Health Insurance Service‐National Health Screening Cohort) were analyzed. Individuals previously diagnosed with cardiovascular disease or taking lipid‐lowering drugs were excluded. Age‐specific association between LDL‐C and ASCVD was calculated using adjusted Cox proportional hazards models. During a median follow‐up of 6.44 years for 285 119 adults, ASCVD developed in 8996 (3.2%). All age groups showed positive associations between LDL‐C and ASCVD risk, mostly with statistical significance from LDL‐C of 160 mg/dL onward. ASCVD risk did not differ significantly between the age groups (P for interaction=0.489). Correspondingly, subgroup analysis in type 2 diabetes exhibited no difference in the age‐specific association of LDL‐C and ASCVD (P for interaction=0.784).ConclusionsThe study demonstrated that people aged ≥75 years with higher LDL‐C at baseline still presented increased ASCVD risk, which was not significantly different from the younger groups. These findings support the importance of managing LDL‐C for the prevention of primary ASCVD in the growing elderly population.
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