Department of Psychiatry, University of Leipzig, Leipzig, Germany.
Int Psychogeriatr. 2010 Feb;22(1):56-63. doi: 10.1017/S1041610209990676. Epub 2009 Aug 20.
The clock drawing test (CDT) is a common and widely used cognitive screening instrument for the diagnosis of dementia. However, it has remained unclear whether it is a suitable method to identify mild cognitive impairment (MCI). The aim of this paper is to review systematically the studies concerning the utility of the CDT in diagnosing MCI.
A systematic literature search was conducted. All studies dealing with utility of CDT in diagnosing MCI regardless of the applied CDT scoring system and MCI concept were selected.
Nine relevant studies were identified. The majority of the studies compared average CDT scores of cognitively healthy and mildly impaired subjects, and four of them identified significant mean differences. If reported, sensitivity and specificity have been mostly unsatisfactory.
CDT should not be used for MCI-screening.
画钟测验（CDT）是一种常用于诊断痴呆的常见且广泛使用的认知筛查工具。然而，目前仍不清楚它是否是一种适合识别轻度认知障碍（MCI）的方法。本文旨在系统地回顾有关 CDT 在诊断 MCI 中的效用的研究。
进行了系统的文献检索。选择了所有涉及 CDT 在诊断 MCI 中的效用的研究，无论应用的 CDT 评分系统和 MCI 概念如何。
确定了 9 项相关研究。大多数研究比较了认知健康和轻度受损受试者的平均 CDT 评分，其中 4 项研究发现了显著的平均差异。如果有报道，敏感性和特异性大多不尽如人意。
CDT 不应用于 MCI 筛查。
