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Published on: October 12, 2017
Association between low-density lipoprotein cholesterol level and all-cause mortality in idiopathic dilated
Kexin Jiang1,2, Xiaobo Pu1, Yutong Liu3
1Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China.
Insights
In idiopathic cardiomyopathy (iDCM) patients, lower low-density lipoprotein cholesterol (LDL-C) levels are linked to increased mortality risk. This association is more pronounced in patients with poorer heart function, suggesting LDL-C
Area of Science:
- Cardiology
- Clinical Research
- Epidemiology
Background:
- Low-density lipoprotein cholesterol (LDL-C) is a known cardiovascular risk factor.
- The prognostic role of LDL-C in idiopathic cardiomyopathy (iDCM) remains unclear.
Purpose of the Study:
- To investigate the association between LDL-C levels and all-cause mortality in patients with iDCM.
- To explore the predictive value of LDL-C for prognosis in iDCM.
Main Methods:
- Retrospective study of 1058 iDCM patients.
- Analysis of demographic data and variable correlations.
- Cox proportional hazards models used to assess mortality risk.
Main Results:
- Lower LDL-C levels (< 1.78 mmol/L) were associated with a 1.52-fold increased risk of all-cause mortality.
- Higher LDL-C levels (> 2.28 mmol/L) correlated with better prognosis.
- In patients with NYHA class III/IV, LDL-C showed a hazard ratio of 0.83.
Conclusions:
- Lower LDL-C is an independent prognostic factor for increased all-cause mortality in iDCM.
- The predictive value of LDL-C is stronger in patients with advanced heart failure.
- LDL-C may serve as a potential biomarker for risk stratification in iDCM.
Aims:
To determine the association between all-cause mortality and low-density lipoprotein cholesterol (LDL-C) in patients with idiopathic cardiomyopathy (iDCM).
Background:
LDL-C had long been considered as a dangerous predictor of cardiovascular diseases; however, the correlation between them was not fully clarified.
Methods:
A total of 1058 patients who met the World Health Organization criteria for iDCM in West China Hospital (2009-2016) were enrolled in this retrospective study. Baseline demographic characteristics and correlations between variables were calculated and analyzed, and potential predictors were explored using univariate and multivariate regressions. Cox proportional hazards models were used to determine correlation on a continuous scale.
Results:
LDL-C is an independent prognostic factor and higher LDL-C levels are associated with better prognosis in iDCM patients according to cox regression analysis. Compared with individuals which LDL > 2.28 mmol/L (75th-100th percentile), the multivariable-adjusted hazard ratio for all-cause mortality was 1.52 (95%CI: 1.03-2.26) in patients with LDL-C < 1.78 mmol/L (0-25th percentile). In patients with New York Heart Association function III and IV, LDL-C levels have a hazard ratio of 0.83 (confidence interval 0.73-0.95).
Conclusions:
In patients with iDCM, lower LDL-C level was associated with an increased risk of all-cause mortality. The correlation between mortality and LDL-C level was stronger in patients with worse heart function. LDL-C levels have a potential predictive value in iDCM patients.
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