Association between Statins and Retinal Vascular Occlusion: A Population-Based Cohort Study

Area of Science:

• Ophthalmology
• Cardiology
• Pharmacology

Background:

• Retinal vascular occlusion (RVO) is a prevalent retinal vascular disease causing visual disturbances, with unclear pathogenesis.
• Hyperlipidemia is a significant risk factor for RVO, and statins are widely used to manage cholesterol and reduce cardiovascular risks.
• Statins possess immunomodulatory properties that may be relevant in treating inflammatory conditions like RVO.

Purpose of the Study:

• To investigate the potential protective effect of statin use against the development of RVO.
• To compare the incidence of RVO in adult statin users versus non-users.

Main Methods:

• A retrospective cohort study utilizing the Taiwan National Health Insurance Research Database (NHIRD) from 2000 to 2013.
• Adult patients with statin usage were identified and matched with a threefold control group based on age, sex, and index date.
• Follow-up was conducted for an average of 12.87 years to assess RVO incidence.

Main Results:

• The cumulative incidence of RVO was significantly lower in the statin-user group (29.96 per 105 person-years) compared to the non-statin-user group (39.35 per 105 person-years).
• A log-rank test indicated a statistically significant difference (p = 0.020) in RVO incidence between the groups.
• The adjusted hazard ratio for RVO was significantly lower in statin users (adjusted HR, 0.704; 95% CI, 0.591-0.873), indicating a decreased risk.

Conclusions:

• Statin treatment is associated with a reduced risk of developing all types of RVO, including central retinal artery occlusion, branch artery occlusion, central retinal vein occlusion, and branch vein occlusion.
• Patients prescribed statins demonstrated a lower cumulative incidence rate of RVO.
• The findings suggest a protective role for statins in preventing retinal vascular occlusion.