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Association Between Ratio of Cholesterols and Coronary Artery Stenosis According to Low-Density
So Ree Kim1, Mi-Na Kim1, Hee-Dong Kim2
1Division of Cardiology, Korea University Anam Hospital, Seoul, Korea.
Insights
Cholesterol ratios, not just LDL-C, are linked to coronary artery disease (CAD) risk in Korean adults. These associations persist even with statin use or when LDL-C is within target ranges, highlighting their importance in CAD assessment.
Area of Science:
- Cardiology
- Lipid Metabolism
- Preventive Medicine
Background:
- Low-density lipoprotein cholesterol (LDL-C) is a primary target for preventing atherosclerotic cardiovascular disease.
- Coronary artery disease (CAD) can still develop in individuals with recommended LDL-C levels.
- Understanding alternative lipid markers is crucial for comprehensive CAD risk assessment.
Purpose of the Study:
- To investigate the association between various lipid parameters and CAD in Korean patients with suspected angina.
- To evaluate if these associations are influenced by statin use or achieved LDL-C target levels.
Main Methods:
- Analysis of data from 2,410 Korean adults undergoing coronary angiography (2012-2022).
- CAD defined as ≥50% stenosis in major coronary arteries.
- Principal component analysis and multivariable logistic regression used to assess lipid parameter associations, with NRI and IDI for model discrimination.
Main Results:
- Cholesterol ratios (Total Cholesterol/HDL-C, non-HDL-C/HDL-C, LDL-C/HDL-C) were significantly associated with CAD.
- These associations were consistent across different statin use statuses and LDL-C levels.
- Cholesterol ratios improved the predictive performance of models for CAD detection.
Conclusions:
- Cholesterol ratios demonstrate significant cross-sectional associations with CAD in a Korean population.
- The predictive value of these ratios for CAD is independent of statin therapy and LDL-C control.
- Cholesterol ratios may offer valuable insights beyond LDL-C for assessing CAD risk.
Background And Objectives:
Low-density lipoprotein cholesterol (LDL-C) remains the principal therapeutic target in preventing atherosclerotic cardiovascular disease. Nevertheless, coronary artery disease (CAD) may develop even in patients whose LDL-C levels are at recommended targets. Using a contemporary Korean multicenter registry, we examined the association between lipid parameters and CAD in patients with suspected angina, considering statin use and LDL-C levels.
Methods:
We analyzed data from 2,410 adults with chest pain who underwent coronary angiography at 21 centers in South Korea (2012-2022). CAD was defined as ≥50% stenosis in major coronary arteries. To address multicollinearity among lipid parameters, principal component analysis-derived components were evaluated in multivariable logistic regression, with additional assessment of model discrimination using net reclassification improvement (NRI) and integrated discrimination improvement (IDI).
Results:
Among the study population (60.1% women), 52.0% were on statins, and 36.5% were diagnosed with CAD, which was more frequent in statin users. The proportion of patients with LDL-C within target ranges was similar between statin users and non-users (p=0.695). Total cholesterol/high-density lipoprotein cholesterol (HDL-C) ratio, non-HDL-C/HDL-C ratio, and LDL-C/HDL-C ratio showed significant associations with CAD. These associations remained consistent regardless of statin use or LDL-C levels. Total cholesterol/HDL-C and non-HDL-C/HDL-C ratios moderately improved model performance (NRI: 0.413, IDI: 0.024); LDL-C/HDL-C ratio showed mild improvement (NRI: 0.373, IDI: 0.030).
Conclusions:
In this large, real-world Korean cohort, cholesterol ratios showed cross-sectional associations with CAD. These associations remained consistent regardless of statin use or LDL-C levels.
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