Ribeiro Filho Sergio Telles, Lourenço Roberto Alves
MD, Laboratório de Pesquisa em Envelhecimento Humano, GeronLab, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
MD, MPH, PhD, Laboratório de Pesquisa em Envelhecimento Humano, GeronLab, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil. Internal Medicine Department, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Dement Neuropsychol. 2009 Apr-Jun;3(2):81-87. doi: 10.1590/S1980-57642009DN30200003.
To study the criterion validity of the Mini-Cog in low educational level elderly. Cross-sectional and validation design. Policlínica Piquet Carneiro, an outpatient unit of Rio de Janeiro State University Hospital, in Brazil. A convenient sample consisting of 306 individuals, 65 yrs or older, selected from April 8 to July 15, 2002.
All participants underwent comprehensive geriatric evaluations which included the Mini-Mental State Examination (MMSE) and the cognitive part of the Cambridge Examination for Mental Disorders of the Elderly - Revised (CAMCOG-R). They were classified as demented or non-demented (DSM-IV). A post-hoc analysis was performed on the data from the 3 word recall test of the MMSE, and the Clock Drawing Test from the CAMCOG-R, and respective scores were added and interpreted in accordance with the Mini-Cog protocol.
293 individuals completed all the study steps; 211 had 4 or less years of schooling and were included in the data analysis. 32% had dementia. Mini-Cog sensitivity and specificity was consistently low independently of the different cut-off points considered. The best performance was found at the cut-off point of 2/3 which yielded sensitivity and specificity of 60% and 65%, respectively.
The Mini-Cog is not a good cognitive screening tool for individuals with less than five years of formal education.
研究简易认知筛查量表（Mini-Cog）在低教育水平老年人中的效标效度。采用横断面和效度验证设计。研究地点为巴西里约热内卢州立大学医院的门诊皮克·卡内罗诊所。选取2002年4月8日至7月15日期间年龄在65岁及以上的306名个体作为便利样本。
所有参与者均接受了全面的老年评估，包括简易精神状态检查表（MMSE）和修订版的剑桥老年精神障碍检查表的认知部分（CAMCOG-R）。根据《精神疾病诊断与统计手册》第四版（DSM-IV）将他们分类为痴呆或非痴呆。对MMSE的3个单词回忆测试数据以及CAMCOG-R的画钟测试数据进行事后分析，并根据Mini-Cog方案将各自的分数相加并进行解释。
293名个体完成了所有研究步骤；211名受教育年限为4年及以下，被纳入数据分析。32%患有痴呆。无论考虑何种不同的临界值，Mini-Cog的敏感性和特异性始终较低。在临界值为2/3时表现最佳，其敏感性和特异性分别为60%和65%。
对于正规教育年限少于5年的个体，Mini-Cog不是一个良好的认知筛查工具。
