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. 1994 Dec;51(12):1198-204.
doi: 10.1001/archneur.1994.00540240042014.

Reliability and validity of NINCDS-ADRDA criteria for Alzheimer's disease. The National Institute of Mental Health Genetics Initiative

D Blacker  1 , M S Albert, S S Bassett, R C Go, L E Harrell, M F Folstein
Affiliations

Reliability and validity of NINCDS-ADRDA criteria for Alzheimer's disease. The National Institute of Mental Health Genetics Initiative

D Blacker et al. Arch Neurol. 1994 Dec.

Abstract

Objective: To assess interrater reliability and validity of NINCDS-ADRDA (National Institute of Neurological and Communicative Diseases and Stroke/Alzheimer's Disease and Related Disorders Association) criteria for Alzheimer's disease (AD).

Design: A multisite reliability and validity study in which clinicians from each site diagnosed 60 case summaries yielding a preconsensus estimate of reliability and validity. A consensus conference was conducted for each disagreement, leading to a postconsensus estimate of validity. The criterion standard was a diagnosis of AD by autopsy.

Setting: Three academic medical centers.

Subjects: A convenience sample of 60 detailed case summaries, 40 with AD and 20 with other dementing disorders.

Main outcome measures: The kappa coefficient, sensitivity, and specificity.

Results: The kappa coefficient for preconsensus agreement on a diagnosis of probable or possible AD vs non-AD was 0.51; the sensitivity of a diagnosis of probable or possible AD for a pathological diagnosis of AD was 0.81, and the specificity was 0.73. The postconsensus sensitivity was 0.83, and the specificity was 0.84.

Conclusions: The results support the reliability and validity of NINCDS-ADRDA criteria and show that the consensus process may improve diagnostic accuracy. The cases are reviewed with a focus on the sources of diagnostic disagreements and errors and possible changes that might improve the accuracy of the criteria.

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