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Intraindividual variability in psychometrically defined mild cognitive impairment status in older African Americans

机译：老年非裔美国人心理上定义的轻度认知障碍状态的个体差异

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This study examines day-to-day variability in psychometrically defined mild cognitive impairment (MCI) status and potential predictors of changes in MCI status in an independent-living sample of urban dwelling older adults in Baltimore, Maryland. The participant sample consisted of 50 older adults, ranging in age from 50 to 80 years. Participants completed health and cognitive measures (i.e., executive function, language, memory, and global cognition) over 8 occasions within a 2-3-week period. After each testing occasion, a post hoc classification of MCI status was determined using psychometrically defined criteria based on cognitive performance. Participants who classified as MCI after one assessment often did not meet MCI criteria at subsequent occasions. Daily fluctuations in sleep duration were associated with an increased risk for MCI classification. These results demonstrate that changes in sleep may explain changes in MCI status, particularly for African Americans.
机译：这项研究调查了马里兰州巴尔的摩市一个独立居住的城市老年人的心理计量学定义的轻度认知障碍（MCI）状态的日常变化以及MCI状态变化的潜在预测因素。参与者样本包括50位年龄在50至80岁之间的老年人。参加者在2-3周内完成了8次健康和认知测量（即执行功能，语言，记忆和整体认知）。在每个测试场合之后，使用基于认知表现的心理测量定义标准确定MCI状态的事后分类。一项评估后被归类为MCI的参与者通常在随后的场合不符合MCI标准。睡眠时间的每日波动与MCI分类的风险增加有关。这些结果表明，睡眠的变化可以解释MCI状态的变化，尤其是对于非洲裔美国人而言。

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