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Impact of hypertriglyceridaemia on cardiovascular mortality according to low-density lipoprotein cholesterol in a 15.6-million population.
European Journal of Preventive Cardiology 2023 October 19
AIMS: To assess the association between triglyceride (TG) levels and cardiovascular disease (CVD) mortality concerning low-density lipoprotein cholesterol (LDL-C) and age in the general population.
METHODS AND RESULTS: From the Korean National Health Insurance Service database, 15,672,028 participants aged 18-99 who underwent routine health examinations were followed up for CVD mortality. Hazard ratios (HRs) for CVD mortality were calculated using Cox models after adjusting for various confounders. During a mean 8.8 years of follow-up, 105,174 individuals died of CVD. There was a clear log-linear association between TG and overall CVD mortality down to 50 mg/dL. Each two-fold increase in TG was associated with 1.10-fold (overall CVD), 1.22-fold (ischaemic heart disease [IHD]), 1.24-fold (acute myocardial infarction [AMI]), and 1.10-fold (ischaemic stroke) higher CVD mortality. Haemorrhagic stroke and heart failure were not associated with TG levels. The impact of HTG on CVD weakened but remained present in persons with LDL-C <100 mg/dL, in whom each two-fold higher TG was associated with 1.05-fold (overall CVD), 1.12-fold (IHD), 1.15-fold (AMI), and 1.05-fold (ischaemic stroke) higher CVD mortality. The younger population (18 to 44 years) had stronger associations between TG levels and mortality from overall CVD, IHD, and AMI than the older population.
CONCLUSION: Hypertriglyceridaemia (HTG) independently raises CVD mortality with lingering risks in young and older individuals with low LDL-C levels, suggesting the importance of management of HTG even with controlled LDL-C.
METHODS AND RESULTS: From the Korean National Health Insurance Service database, 15,672,028 participants aged 18-99 who underwent routine health examinations were followed up for CVD mortality. Hazard ratios (HRs) for CVD mortality were calculated using Cox models after adjusting for various confounders. During a mean 8.8 years of follow-up, 105,174 individuals died of CVD. There was a clear log-linear association between TG and overall CVD mortality down to 50 mg/dL. Each two-fold increase in TG was associated with 1.10-fold (overall CVD), 1.22-fold (ischaemic heart disease [IHD]), 1.24-fold (acute myocardial infarction [AMI]), and 1.10-fold (ischaemic stroke) higher CVD mortality. Haemorrhagic stroke and heart failure were not associated with TG levels. The impact of HTG on CVD weakened but remained present in persons with LDL-C <100 mg/dL, in whom each two-fold higher TG was associated with 1.05-fold (overall CVD), 1.12-fold (IHD), 1.15-fold (AMI), and 1.05-fold (ischaemic stroke) higher CVD mortality. The younger population (18 to 44 years) had stronger associations between TG levels and mortality from overall CVD, IHD, and AMI than the older population.
CONCLUSION: Hypertriglyceridaemia (HTG) independently raises CVD mortality with lingering risks in young and older individuals with low LDL-C levels, suggesting the importance of management of HTG even with controlled LDL-C.
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