Original articleRisk of Advanced Age-Related Macular Degeneration after Cataract Surgery in the Age-Related Eye Disease Study: AREDS Report 25
Section snippets
Study Population
Details of the study design and methods, presented elsewhere,16 are briefly summarized here. Eleven retinal specialty clinics enrolled 4757 participants in the AREDS from 1992 through 1998. Participants were 55 through 80 years of age at enrollment and had best-corrected visual acuity (VA) of 20/32 or better in at least 1 eye (the study eye[s]). Media had to be sufficiently clear to obtain adequate quality stereoscopic fundus photographs of the macula in all study eyes. VA was assessed by
Results
Table 1 gives the distribution of baseline characteristics for participants with and without cataract surgery. Risk of advanced AMD associated with cataract surgery is summarized in Table 2 and Figure 1 and is given in detail below.
Discussion
The results from the Cox proportional hazards models used to examine AREDS data show little evidence of a detrimental effect of cataract surgery on progression to advanced AMD. Use of the Cox regression model allows us to take advantage of a unique feature of AREDS, the ability to examine the effect of important covariates, including time-dependent covariates, on progression to late AMD. Results from the Cox models are not statistically significant and there are no consistent trends among
Acknowledgments
The authors thank Molly Harrington, MA, Jonghyeon Kim, PhD, and Martin Ho, MS, of the EMMES Corporation for extensive statistical assistance.
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Manuscript no. 2008-701.
Financial Disclosure(s): The author(s) have no proprietary or commercial interest in any materials discussed in this article.
Supported by contracts from the National Eye Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland.