Glaucoma and mortality risk: findings from a prospective population-based study.

Area of Science:

• Ophthalmology
• Public Health
• Epidemiology

Background:

• Glaucoma, a neurodegenerative optic nerve disease, can lead to blindness.
• Previous studies suggested a link between glaucoma and increased mortality but suffered from methodological weaknesses.
• These limitations included non-representative samples and inadequate control for confounding variables.

Purpose of the Study:

• To investigate the association between diagnosed glaucoma and all-cause mortality.
• To address limitations of prior research by using a population-based sample and comprehensive confounder adjustment.

Main Methods:

• Utilized data from the National Health and Nutrition Examination Survey (NHANES) 2005-2008 cycles.
• Standardized glaucoma diagnoses were derived from fundus photography.
• Multivariable Cox proportional hazards regression models were employed to assess mortality risk, accounting for NHANES complex survey design.

Main Results:

• The study included 5385 participants, with 138 diagnosed with glaucoma at baseline.
• Initially, unadjusted analysis showed a higher mortality risk (HR 2.06), but this was not significant after adjusting for age and sex (HR 0.74).
• Further adjustments for other potential confounders did not alter the findings, indicating no statistically significant association.

Conclusions:

• This population-based study found no evidence to support an increased mortality risk in individuals with glaucoma.
• The findings suggest that previously observed associations may have been influenced by confounding factors, particularly age.