Summary of the Systematic Review

Article Citation

The Diagnostic Accuracy of the Ascertain Dementia 8 Questionnaire for Detecting Cognitive Impairment in Primary Care in the Community, Clinics and Hospitals: A Systematic Review and Meta-Analysis

Chen, H. -H., Sun, F. -J., et al. (2018).
Family Practice, 35(3), 239-246.
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Article Quality Ratings

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Indicators of Review Quality

  • Yes The review states a clearly focused question/aim.
  • Yes Criteria for inclusion of studies are provided.
  • Yes Search strategy described in sufficient detail for replication.
  • Yes Included studies are assessed for study quality.
  • Yes Quality assessments are reproducible.
  • Yes Characteristics of the included studies are provided.

Quality Rating Notes

Study Quality: The quality indicator was reviewed with supplementary materials.

Article Details

Description

This is a systematic review and meta-analysis of studies investigating the Ascertain Dementia 8 (AD8) questionnaire to detect cognitive decline in adults. Although speech-language pathologists do not diagnose dementia, findings from this review may be useful for identifying tools for detection of cognitive impairments in individuals.

Questions/Aims Addressed

"The objective of this systematic review was to determine the diagnostic accuracy of the AD8 in all-cause cognitive impairment in a primary care setting in the community, clinics and hospitals" (p. 240).

Population

Adult patients in a primary care setting

Intervention/Assessment

Ascertain Dementia 8 questionnaire

Number of Studies Included

7

Years Included

August 2005 to April 2017


Conclusions from This Systematic Review

What are Conclusions?

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Screening

Findings indicated that the sensitivity (0.72, 0.91) of the Ascertain Dementia 8 (AD8) questionnaire was superior to the specificity (0.67, 0.78) in screening for cognitive impairment in primary care settings in the community, clinics, and hospitals. Results also suggested that false positive results may occur with the AD8 due to poorer specificity and positive likelihood ratio (2.52, 3.94), but false negative results were suggested to be less likely due to a higher negative likelihood ratio (0.17, 0.13). "Therefore, similar to all other screening tools, if the result is positive, a further diagnosis is necessary" (p. 245).

Keywords: Setting (Home/Community/SNF), Clinic, Community, Cognitive-Communication

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Screening

Findings indicated that the sensitivity (0.72, 0.91) of the Ascertain Dementia 8 (AD8) questionnaire was superior to the specificity (0.67, 0.78) in screening for cognitive impairment in primary care settings in the community, clinics, and hospitals. Results also suggested that false positive results may occur with the AD8 due to poorer specificity and positive likelihood ratio (2.52, 3.94), but false negative results were suggested to be less likely due to a higher negative likelihood ratio (0.17, 0.13). "Therefore, similar to all other screening tools, if the result is positive, a further diagnosis is necessary" (p. 245).

Keywords: Setting (Home/Community/SNF), Clinic, Community, Cognitive-Communication

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