Teresa Filshtein1, Michelle Chan2, Dan Mungas2, Rachel Whitmer3, Evan Fletcher2, Charles DeCarli2, Sarah Farias2. 1. Department of Epidemiology and Biostatistics, University of California, San Francisco, CA94158, USA. 2. Department of Neurology, University of California, Davis, CA95817, USA. 3. Department of Public Health Sciences, University of California, Davis, CA95616, USA.
Abstract
OBJECTIVE: The Everyday Cognition (ECog) scales measure cognitively based across domains of everyday abilities that are affected early in the course of neurodegenerative disorders such as Alzheimer's disease. However, the degree to which the ECog may be differentially influenced by ethnic/racial background is unknown. This study evaluates measurement invariance of the ECog across non-Hispanic White (NHW), Black, and Hispanic individuals. METHODS: Participants included 1177 NHW, 243 Black, and 216 Hispanic older adults from the UC Davis Alzheimer's Disease Center Cohort who had an ECog. Differential item functioning (DIF) for each ECog domain was evaluated separately for Black and Hispanic participants compared to NHW participants. An iterative multiple group confirmatory factor analysis approach for ordinal scores was used to identify items whose measurement properties differed across groups and to adjust scores for DIF. Adjusted scores were then evaluated to test whether they were more strongly associated with cognitive function (concurrent and longitudinal change in cognition) and brain volumes (measured by brain imaging). RESULTS: Varying levels, patterns, and impacts of DIF were found across domains and groups. However, the impact of DIF was relatively small, and DIF effects on scores generally were less than one-half standard error of measurement. There were no meaningful differences in associations with cognition and brain injury between DIF adjusted and unadjusted scores. CONCLUSIONS: Varying patterns of DIF were observed across the Black and Hispanic participants across select ECog domains. Overall, DIF effects were relatively small and did not change the relationship between the ECog and other indicators of disease.
OBJECTIVE: The Everyday Cognition (ECog) scales measure cognitively based across domains of everyday abilities that are affected early in the course of neurodegenerative disorders such as Alzheimer's disease. However, the degree to which the ECog may be differentially influenced by ethnic/racial background is unknown. This study evaluates measurement invariance of the ECog across non-Hispanic White (NHW), Black, and Hispanic individuals. METHODS:Participants included 1177 NHW, 243 Black, and 216 Hispanic older adults from the UC Davis Alzheimer's Disease Center Cohort who had an ECog. Differential item functioning (DIF) for each ECog domain was evaluated separately for Black and Hispanic participants compared to NHW participants. An iterative multiple group confirmatory factor analysis approach for ordinal scores was used to identify items whose measurement properties differed across groups and to adjust scores for DIF. Adjusted scores were then evaluated to test whether they were more strongly associated with cognitive function (concurrent and longitudinal change in cognition) and brain volumes (measured by brain imaging). RESULTS: Varying levels, patterns, and impacts of DIF were found across domains and groups. However, the impact of DIF was relatively small, and DIF effects on scores generally were less than one-half standard error of measurement. There were no meaningful differences in associations with cognition and brain injury between DIF adjusted and unadjusted scores. CONCLUSIONS: Varying patterns of DIF were observed across the Black and Hispanic participants across select ECog domains. Overall, DIF effects were relatively small and did not change the relationship between the ECog and other indicators of disease.
Authors: David P Sheppard; Matthew W Gallagher; Erin E Morgan; Angulique Y Outlaw; Sylvie Naar; Steven Paul Woods Journal: J Int Neuropsychol Soc Date: 2021-05-06 Impact factor: 3.114
Authors: Zvinka Z Zlatar; Wassim Tarraf; Kevin A González; Priscilla M Vásquez; María J Marquine; Richard B Lipton; Linda C Gallo; Tasneem Khambaty; Donglin Zeng; Marston E Youngblood; Mayra L Estrella; Carmen R Isasi; Martha Daviglus; Hector M González Journal: Alzheimers Dement Date: 2021-05-31 Impact factor: 16.655
Authors: E Nichols; J A Deal; B K Swenor; A G Abraham; N M Armstrong; K Bandeen-Roche; M C Carlson; M Griswold; F R Lin; T H Mosley; P Y Ramulu; N S Reed; A R Sharrett; A L Gross Journal: BMC Med Res Methodol Date: 2022-03-27 Impact factor: 4.612
Authors: Ester Cerin; Anthony Barnett; Basile Chaix; Mark J Nieuwenhuijsen; Karen Caeyenberghs; Bin Jalaludin; Takemi Sugiyama; James F Sallis; Nicola T Lautenschlager; Michael Y Ni; Govinda Poudel; David Donaire-Gonzalez; Rachel Tham; Amanda J Wheeler; Luke Knibbs; Linwei Tian; Yih-Kai Chan; David W Dunstan; Alison Carver; Kaarin J Anstey Journal: BMJ Open Date: 2020-03-18 Impact factor: 2.692