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[Clock drawing task as screening for cognitive impairment in the elderly population]

H Hoshino¹, Y Takagi, H Miyaoka

¹Department of Neurology, Tokyo Saiseikai Central Hospital.

Nihon Ronen Igakkai Zasshi. Japanese Journal of Geriatrics

|September 1, 1993

Summary

The Clock-Drawing Task is a practical screening tool for cognitive impairment in the elderly. It demonstrated high sensitivity and correct identification rates, making it useful for clinicians.

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Area of Science:

Gerontology
Neurology
Cognitive Assessment

Context:

Cognitive impairment is a growing concern in the elderly population.
Early detection of cognitive decline is crucial for timely intervention.
Existing screening tools like the Mini-Mental State Test (MMST) have limitations.

Purpose:

To compare the effectiveness of the Clock-Drawing Task (CDT) against the MMST for screening cognitive impairment in older adults.
To evaluate the diagnostic accuracy of the CDT using sensitivity, specificity, and correct identification rates.

Summary:

This study involved 834 elderly individuals, comparing the CDT to the MMST (cut-off score ≤20 for impairment).
The CDT was assessed based on frame, numbers, and hands, with a criterion of ≥2 components correct.

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The CDT achieved 89% sensitivity, 65% specificity, and 83% correct identification for cognitive impairment.

Impact:

The Clock-Drawing Task is a practical and effective screening tool for identifying cognitive impairment in geriatric populations.
Findings suggest the CDT can aid clinicians in early detection and management of cognitive decline.
This research supports the integration of the CDT into routine geriatric assessments.