Article Text
PostScript
Letter
Incorrect study design and analysis: the effect of genetic variants in SERPING1 on the risk of neovascular age-related macular degeneration
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The recently published study by Lee et al1 is described as a retrospective cohort study; however, this is incorrect. The study subjects were selected on the basis of having neovascular age-related macular degeneration (AMD) or not, and the two groups being matched with respect to ethnicity. The frequency of individual genotypes was then compared between …
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Competing interests None.
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