Umayal S, Kulathunga M, Somaratne S, Srikanth S, Kathriarachchi S, De Silva Ranil
Dept of Anatomy, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka.
BMC Res Notes. 2010 Oct 26;3:268. doi: 10.1186/1756-0500-3-268.
Cognitive tests have been used in population surveys as first stage screens for dementia but are biased by education. However functional ability scales are less biased by education than the cognitive scale and thus can be used in screening for dementia.
To validate Activities of Daily Living (ADL) scale appropriate for use in assessing the presence of dementia in an elderly population living in care homes in Sri Lanka.
Sinhalese version of the modified Bristol and Blessed scale was administered to subjects aged 55 years and above residing in 14 randomly selected elders' homes. Receiver Operating Characteristic (ROC) was used to determine the cut-off scores of both the scales.
Based on the ROC analysis, optimal cut off score of the modified Bristol scale was 20 with a sensitivity of 100%, specificity of 74.2% and the area under the curve 0.933(95% CI: 0.871-0.995) while the optimal cut off score of the modified Blessed scale was 10.5 with a sensitivity of 100%, specificity of 71% and the area under the curve 0.892 (95% CI: 0.816-0.967).
The findings confirm that both the scales can be used in screening for dementia in the elderly living in care homes in Sri Lanka.
认知测试已在人口调查中用作痴呆症的第一阶段筛查，但受教育程度会对其产生偏差影响。然而，功能能力量表受教育程度的偏差影响比认知量表小，因此可用于痴呆症筛查。
验证适用于评估斯里兰卡养老院老年人群中痴呆症存在情况的日常生活活动（ADL）量表。
对居住在14所随机选择的养老院中55岁及以上的受试者使用僧伽罗语版的改良布里斯托尔量表和Blessed量表。采用受试者工作特征（ROC）曲线来确定两个量表的临界分数。
基于ROC分析，改良布里斯托尔量表的最佳临界分数为20，灵敏度为100%，特异度为74.2%，曲线下面积为0.933（95%CI：0.871 - 0.995）；而改良Blessed量表的最佳临界分数为10.5，灵敏度为100%，特异度为71%，曲线下面积为0.892（95%CI：0.816 - 0.967）。
研究结果证实，这两个量表均可用于筛查斯里兰卡养老院中的老年人是否患有痴呆症。
