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The Cholesterol Paradox in Long-Livers from a Sardinia Longevity Hot Spot (Blue Zone).

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February 2025

Dipartimento di Medicina, Chirurgia e Farmacia, University of Sassari, Clinica Medica, Viale San Pietro 8, 07100 Sassari, Italy.

: Hypercholesterolemia is commonly viewed as a risk factor for coronary heart disease; however, several studies have reported an inverse relationship between cholesterol levels and cardiovascular mortality, particularly in older adults. This "cholesterol paradox" challenges the conventional understanding of lipid metabolism. Despite often being dismissed as a result of reverse causality, the precise causes of this paradox remain poorly understood.

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Aim: This study aimed to investigate how blood lipids are associated with diabetes among older Chinese adults.

Methods: 3,268,928 older Chinese adults without known diabetes were included. Logistic regression and restricted cubic spline (RCS) models were conducted to study associations between blood lipids (total cholesterol [TC], triglycerides [TG], low-density lipoprotein cholesterol [LDL-C], and high-density lipoprotein cholesterol [HDL-C]) and diabetes.

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Cholesterol paradox in the community-living old adults: is higher better?

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December 2023

Department of anti-NBC Medicine, Chinese PLA Medical School, Chinese PLA General Hospital, Beijing, China.

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Article Synopsis
  • The study examines the relationship between blood cholesterol levels and coronary heart disease (CHD) risk among over 4 million veterans, exploring claims of a U-shaped association.
  • Findings reveal a J-shaped relationship, indicating that while lower cholesterol levels (below 180 mg/dL) show flat CHD mortality risk, higher cholesterol levels significantly increase this risk.
  • The results support the lipid hypothesis, suggesting that lower cholesterol is linked to reduced CHD risk, especially highlighting that low cholesterol due to medication does not alter this association.
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