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1. Erratum Statement for our article: Prevalence of Cognintive Impairment without Dementia in the U.S.

   • Brenda Plassman, PhD
   • Kenneth S. Langa, Gwenith G. Fisher, Steven G. Heeriga, et al.

   Duke University Medical Center
   In a recent article (1), an error was discovered in the total population estimate for the >90 age group that was used to calculate the sample weights and the total number of individuals with cognitive impairment without dementia for 2002 in the United States. The sample weights have been re-calculated using the corrected population estimate, and the results in the article revised. Here we provide a revised Table 3 that shows a slightly lower estimate of total prevalence of cognitive impairment without dementia due to the now corrected smaller size of the > 90 year old group. The revised weights do not change the conclusions that we reached, but they do slightly change many of the numeric values in the article. The revised sample weights and an explanation of the reason for their change can be found at http://hrsonline.isr.umich.edu/sitedocs/userg/adams/ADAMSSampleWeights_Jun2009.pdf We also noted an error in the calculation of the association between apolipoprotein E (APOE) and progression to dementia in the multivariate logistic regression model reported on page 432 in the Results section of the article. The revised analyses showed that the presence of at least one APOE e4 allele was significantly associated with progression to dementia (odds ratio = 4.05; confidence interval = 1.12 – 14.72). Reference

   1. Plassman BL, Langa KM, Fisher GG, et al. Prevalence of cognitive impairment without dementia in the United States. Ann Intern Med. 2008;148(6):427-34.

   Conflict of Interest:

   None declared

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   Published June 26, 2009