The prevalence of age-related macular degeneration and osteoporosis in the older Polish population: Is there a link?

Abstract

Background Age-related macular degeneration is the primary cause of irreversible blindness in developed countries, whereas the global prevalence of osteoporosis–a major public health problem–is 19.7%. Both diseases may coincide in populations aged >50 years, leading to serious health deterioration and decreased quality of life. Objectives This study aimed to analyze the relationship between age-related macular degeneration and osteopenia, defined as decreased bone mineral density, in the Polish population. Methods Participants were derived from the population-based Bialystok PLUS Study. Randomized individuals were stratified into two groups, those with age-related macular degeneration (AMD-1 group) or without age-related macular degeneration (AMD-0 group). Using a cutoff value of −1.0 to identify low bone mass, participants with femoral bone mineral density T-scores above −1.0 were assigned to the normal reference, and those with T-scores below −1.0 were assigned to the osteopenia category. Among 436 Caucasian participants aged 50–80 years (252 women, 184 men), the prevalence of age-related macular degeneration was 9.9% in women and 12.0% in men. Decreased bone mineral density based on T-scores was observed in 36.9% of women and in 18.9% of men. Significant differences in femoral bone mineral density between the AMD-0 and AMD-1 groups were detected only in men (mean difference [95% confidence interval] = 0.11 (0.02; 0.13); p = 0.012 for femoral bone mineral density, and 0.73 [0.015; 0.94]; p = 0.011 for the femoral T-score). No associations were observed between bone mineral density and age-related macular degeneration in women. Conclusion Decreased femoral bone mineral density may be associated with a higher risk of age-related macular degeneration in men, but a causal link remains unclear.