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Low-Density Lipoprotein Cholesterol is Inversely Associated with All-Cause Mortality of Patients in the Coronary Care

Yingbei Weng1, Ripeng Yin1, Lala Qian1

  • 1Department of Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, People's Republic of China.

International Journal of General Medicine
|November 12, 2021
PubMed

Insights

High low-density lipoprotein cholesterol (LDL-C) levels are linked to decreased mortality in coronary care unit (CCU) patients. This finding suggests LDL-C may have prognostic value for CCU patient outcomes.

Area of Science:

  • Cardiology
  • Clinical Medicine
  • Epidemiology

Background:

  • Coronary care unit (CCU) patients face significant mortality risks.
  • The prognostic role of low-density lipoprotein cholesterol (LDL-C) in CCU patients remains incompletely understood.
  • Understanding factors influencing CCU patient outcomes is crucial for improving care.

Purpose of the Study:

  • To investigate the association between LDL-C levels and all-cause mortality in CCU patients.
  • To assess LDL-C's predictive value for CCU patient prognosis.
  • To adjust for potential confounding factors in the LDL-C mortality relationship.

Main Methods:

  • Retrospective analysis of 1476 CCU patients from the MIMIC-III database.
  • Primary endpoint: 30-day all-cause mortality; secondary endpoints: 90-day and one-year mortality, and infections.
  • Statistical analyses included Cox proportional hazard regression and propensity score-matched (PSM) analysis.

Main Results:

  • Higher LDL-C levels (≥ 55 mg/dl) were associated with significantly reduced 30-day, 90-day, and one-year all-cause mortality.
  • Hazard ratios for mortality decreased with higher LDL-C levels, even after adjusting for confounders.
  • Increased LDL-C levels correlated with a lower risk of infection.

Conclusions:

  • Elevated LDL-C levels are associated with a reduced risk of mortality in CCU patients.
  • The observed association between high LDL-C and lower mortality is robust, confirmed by PSM analysis.
  • Further validation in prospective trials is warranted.
Abstract

Keywords:
all-cause mortalitycardiovascular diseasecoronary care unitlow-density lipoprotein cholesterol

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