Correction: Prevalence of Cognitive Impairment Without Dementia

doi:10.7326/0003-4819-151-4-200908180-00024

In a recent article (1), an error was discovered in the total population estimate for the age group older than 90 years 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 recalculated by using the corrected population estimate, and the results in the article have been revised. A revised Table 3 (reprinted here) shows a slightly lower estimate of total prevalence of cognitive impairment without dementia due to the corrected smaller size of the age group older than 90 years. The revised weights do not change the conclusions reached by the authors, but they do slightly change many 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/site_docs/userg/adams/ADAMSSampleWeights_Jun2009.pdf.

Table 3.

Estimated National Prevalence of Cognitive Impairment Without Dementia, by Age Category

Table 3.

An error was also noted in the calculation of the association between apolipoprotein E 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 1 apolipoprotein E4 allele was significantly associated with progression to dementia (odds ratio, 4.05 [95% CI, 1.12 to 14.72]).

References

Plassman
BL
,
Langa
KM
,
Fisher
GG
,
Heeringa
SG
,
Weir
DR
,
Ofstedal
MB
. et al.
Prevalence of cognitive impairment without dementia in the United States.
Ann Intern Med
2008
148
427
34
PubMed
CrossRef

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Letters |18 August 2009

Correction: Prevalence of Cognitive Impairment Without Dementia Free

Table 3.

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Table 3.

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Letters |18 August 2009

Correction: Prevalence of Cognitive Impairment Without Dementia Free

Table 3.

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Table 3.

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