Determinants of retinal venular diameter: the Beaver Dam Eye Study

Area of Science:

• Ophthalmology and Public Health
• Vascular Biology
• Aging Research

Background:

• Retinal venular diameter (RVD) is a potential indicator of systemic vascular health.
• Changes in RVD may reflect aging processes and disease risks.
• Understanding RVD dynamics is crucial for assessing cardiovascular and renal health.

Purpose of the Study:

• To characterize the longitudinal changes in retinal venular diameter within individuals.
• To investigate associations between various risk factors and retinal venular diameter.
• To explore differences in RVD changes across diverse risk profiles.

Main Methods:

• Population-based cohort study design.
• Analysis of data from 4600 participants (aged 43-86) in the Beaver Dam Eye Study (BDES) over 15 years.
• Computer-assisted measurement of retinal venular diameter (central retinal venular equivalent - CRVE) from retinal photographs at four examinations.

Main Results:

• Central retinal venular equivalent (CRVE) demonstrated a tendency to narrow with advancing age.
• Male sex, current smoking, and higher white blood cell (WBC) count were associated with larger concurrent CRVE.
• Higher mean arterial blood pressure and higher serum high-density lipoprotein (HDL) cholesterol were associated with smaller concurrent CRVE.
• History of cardiovascular disease (CVD) and chronic kidney disease (CKD) were linked to a greater decrease in CRVE over time.

Conclusions:

• Retinal venular diameter naturally narrows with age.
• Concurrent venular diameter is independently associated with sex, blood pressure, HDL cholesterol, WBC count, and smoking status.
• Changes in venular diameter over time are independently associated with cardiovascular disease and chronic kidney disease history.