Time dependent changes in high density lipoprotein cholesterol and cardiovascular risk

Area of Science:

• Cardiology
• Lipid Metabolism
• Preventive Medicine

Background:

• High-density lipoprotein cholesterol (HDL-C) is a key inverse predictor of cardiovascular events.
• Understanding HDL-C dynamics is crucial for cardiovascular risk assessment.

Purpose of the Study:

• To investigate the association between changes in HDL-C levels and the occurrence of subsequent cardiovascular events.
• To determine if persistently low HDL-C impacts cardiovascular risk differently than fluctuating levels.

Main Methods:

• Analysis of 13,037 cardiovascular disease-free subjects with a 6-year follow-up.
• Classification into persistently-low (LL), persistently-high (HH), and intermittently high (LH/HL) HDL-C groups.
• Primary endpoint: first occurrence of a cardiovascular event, analyzed using Kaplan-Meier and Cox regression.

Main Results:

• A total of 529 incident cardiovascular events were recorded.
• Persistently low HDL-C was associated with a 51% increased cardiovascular risk compared to persistently high HDL-C.
• Intermittently high HDL-C groups showed similar cardiovascular risk to persistently high HDL-C groups.

Conclusions:

• Variations in HDL-C levels over time are significantly linked to future cardiovascular risk.
• Patients consistently maintaining low HDL-C levels face the highest cardiovascular risk.