Differential item functioning due to cognitive status does not impact depressive symptom measures in four heterogeneous samples of older adults.
Differential item functioning due to cognitive status does not impact depressive symptom measures in four heterogeneous samples of older adults.
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DOI：
10.1002/gps.4234
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发表时间：
2015-09
影响因子：
4
通讯作者：
Gibbons LE
中科院分区：
文献类型：
--
作者：
Fieo R;Mukherjee S;Dmitrieva NO;Fyffe DC;Gross AL;Sanders ER;Romero HR;Potter GG;Manly JJ;Mungas DM;Gibbons LE
本研究的目的是确定是否差异项目功能（DIF），由于认知状态影响三个抑郁症状的措施，通常用于老年人。采用老年抑郁量表、蒙哥马利-卡斯伯格抑郁评定量表和流行病学研究中心抑郁量表，对参加4项认知老化纵向研究的参与者（N = 3558）进行抑郁症状的差异项目功能评估。参与者根据认知状态进行分组，使用来自每个研究的神经心理电池的一般认知表现评分，并使用代表美国人口的基于人口的调查与全国平均水平相关联。在三项研究中，临床痴呆评分被用作替代分组变量。虽然基于认知状态的统计学显著DIF被发现用于一些抑郁症状项目（例如，与记忆抱怨、食欲不振、缺乏能量和情绪有关的项目），项目偏差对每个量表总分的影响可以忽略不计。这四项研究中的抑郁症状量表以相同的方式测量抑郁症，无论认知状态如何。这可能会减少对在认知老化研究中使用这些抑郁指标的担忧，因为抑郁和认知能力下降之间的关系不太可能是由于项目偏见造成的，至少在我们考虑的数据集中测量的方式上是这样。
The objective of this study is to determine whether differential item functioning (DIF) due to cognitive status impacted three depressive symptoms measures commonly used with older adults. Differential item functioning in depressive symptoms was assessed among participants (N = 3558) taking part in four longitudinal studies of cognitive aging, using the Geriatric Depression Scale, the Montgomery–Åsberg Depression Rating Scale, and the Center for Epidemiologic Studies Depression Scale. Participants were grouped by cognitive status using a general cognitive performance score derived from each study’s neuropsychological battery and linked to a national average using a population-based survey representative of the US population. The Clinical Dementia Rating score was used as an alternate grouping variable in three of the studies. Although statistically significant DIF based on cognitive status was found for some depressive symptom items (e.g., items related to memory complaints, appetite loss, lack of energy, and mood), the effect of item bias on the total score for each scale was negligible. The depressive symptoms scales in these four studies measured depression in the same way, regardless of cognitive status. This may reduce concerns about using these depression measures in cognitive aging research, as relationships between depression and cognitive decline are unlikely to have been due to item bias, at least in the ways that were measured in the datasets we considered.