Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, UMR 1219, Bordeaux, France,
INSERM UMR 1094, Tropical Neuroepidemiology, Faculty of Medicine, Limoges, France,
Dement Geriatr Cogn Disord. 2019;47(1-2):29-41. doi: 10.1159/000492782. Epub 2019 Jan 10.
There are a few validated tools capable of assessing the dimensions essential for the diagnosis of dementia and cognitive disorders in sub-Saharan Africa.
Our aim was to develop an adapted tool, the Central African - Daily Functioning Interference (DFI) scale.
An initial 16-item scale of activity limitations and participation restrictions was completed by 301 participants with low cognitive performances to assess their level of DFI. A psychometric evaluation was performed using Item Response Theory.
A unidimensional 10-item scale emerged with a reasonable coverage of DFI (thresholds range: -1.067 to 1.587) with good item discrimination properties (1.397-4.076) and a high reliability (Cronbach's al pha = 0.92). The cutoff for detecting 96% of those with dementia was with a latent score ≥0.035 that corresponds to the LAUNDRY limitation.
These results provide valuable support for the reliability and internal validity of an operational 10-item scale for DFI assessment used in Central Africa for the diagnosis of dementia in the elderly.
有一些经过验证的工具可以评估撒哈拉以南非洲地区痴呆症和认知障碍诊断所需的维度。
我们旨在开发一种适应性工具，即中非日常功能障碍（DFI）量表。
301 名认知功能低下的参与者完成了一份初步的 16 项活动受限和参与受限量表，以评估他们的 DFI 水平。使用项目反应理论进行心理计量评估。
出现了一个具有良好项目区分度（1.397-4.076）和高可靠性（Cronbach's alpha = 0.92）的一维 10 项量表，涵盖了 DFI 的合理范围（阈值范围：-1.067 至 1.587）。检测 96%痴呆症患者的截定点为潜在得分≥0.035，对应于 LAUNDRY 限制。
这些结果为在中非地区用于诊断老年人痴呆症的操作性 10 项 DFI 评估量表的可靠性和内部有效性提供了有价值的支持。
