AI Article Synopsis
- Cataracts are a major cause of blindness worldwide, and their relationship with dementia risk has been studied with conflicting results.
- This meta-analysis reviewed nine studies involving 448,140 participants and found that cataracts are linked to a higher risk of various forms of dementia, including Alzheimer’s disease.
- The analysis also revealed that cataract surgery may lower the risk of developing dementia, suggesting surgery could be beneficial for those affected by cataracts.
Article Abstract
Background: Cataract is the leading cause of blindness around the world. Previous investigations have assessed the relationship between cataract, cataract surgery and dementia risk, but their results remain controversial. Herein, we conducted a meta-analysis to evaluate the associations between cataract, cataract surgery and the risk of dementia.
Methods: We systemically screened the literature from three electronic databases PubMed, EMBASE and CENTRAL until April 2023. The data were collected by two independent researchers. The hazard ratios (HRs) or odds ratios (ORs) from eligible studies with 95% confidence intervals (CIs) were adjusted into the risk ratios (RRs), which were pooled using the random-effects model.
Results: A total of nine studies with 448,140 participants reported the associations between cataract or cataract surgery and the risk of dementia were included in this meta-analysis. The outcomes of our pooled analysis indicated that cataract was associated with an increased risk of all-cause dementia (RR = 1.24, 95% CI, 1.14-1.35, p < .00001), Alzheimer's disease (RR = 1.22, 95% CI, 1.10-1.35, p = .0002) and vascular dementia (RR = 1.29, 95% CI, 1.01-1.66, p = .04). Cataract surgery is associated with a reduction of the dementia risk (RR = 0.74, 95% CI, 0.67-0.81, p < .00001).
Conclusions: Current evidence from the existing studies supports that cataract is associated with an increased risk of dementia, and cataract surgery may be instrumental in reducing the risk of dementia in patients with cataract.
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| http://dx.doi.org/10.1111/eci.14113 | DOI Listing |
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