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Yingjie Chen 1 Article
Blood lipid levels and all-cause mortality in older adults: the Chinese Longitudinal Healthy Longevity Survey 2008-2018
Rongxi Wang, Xiaoyue Yu, Zhiqiang Wang, Yujie Liu, Hui Chen, Shangbin Liu, Chen Xu, Yingjie Chen, Xin Ge, Danni Xia, Ruijie Chang, Gang Xu, Mi Xiang, Ying Wang, Tian Shen, Fan Hu, Yong Cai
Epidemiol Health. 2022;44:e2022054.   Published online July 5, 2022
DOI: https://doi.org/10.4178/epih.e2022054
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AbstractAbstract PDFSupplementary Material
Abstract
OBJECTIVES
Proper blood lipid levels are essential for survival in older adults, but inconsistent relationships have been reported between blood lipids and all-cause mortality in the elderly.
METHODS
This retrospective longitudinal study analyzed data from 1,067 Chinese older adults enrolled in the Chinese Longitudinal Healthy Longevity Survey collected in 2008 and followed up until death or December 31, 2018. The outcome was all-cause mortality. Multivariate Cox regression analyses were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) with stratification by age (60-80, 80-100, or ≥100 years) for further analysis. The survival probability according to lipid profile quartiles was calculated using Kaplan-Meier curves and the log-rank test.
RESULTS
The participants’ mean age was 84.84 years, and 57.0% were female. In total, 578 individuals died, and 277 were lost to follow-up. The mean total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) levels were higher among those who died than among those who survived. Participants in the second HDL-C quartile and the highest LDL-C and triglyceride (TG) quartiles had 28% higher, 23% lower, and 49% lower risks of all-cause mortality, respectively. After further adjustment, the associations remained except for HDL-C, and additional associations were observed between all-cause mortality and the third TC and LDL-C quartiles and the second TG quartile (HR, 1.44; 95% CI, 1.01 to 2.06; HR, 0.68; 95% CI, 0.49 to 0.94; HR, 0.79; 95% CI, 0.62 to 0.99, respectively).
CONCLUSIONS
Older adults should maintain an LDL-C level of 1.91-2.47 mmol/L and a TG level of no less than 1.66 mmol/L.
Summary
Korean summary
Key Message
The retrospective longitudinal study analyzed data from 1067 Chinese older adults enrolled in the Chinese Longitudinal Healthy Longevity Survey. 578 individuals died and 277 were lost to follow-up. Participants in the second HDL-C quartile and the highest LDL-C and TG quartiles had 28% higher, 23% lower, and 49% lower risks of all-cause mortality. After further adjustment, the associations remained except for HDL-C, and additional associations were observed between all-cause mortality and the third TC and LDL-C quartiles and the second TG quartile (HR, 1.44; 95% CI, 1.01 to 2.06; HR, 0.68; 95% CI, 0.49 to 0.94; HR, 0.79; 95% CI, 0.62 to 0.99).

Epidemiol Health : Epidemiology and Health