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Sex-based dyad differences on informant reports of participants' daily functioning
Lisa V Graves1, Zachary Conaway1, Mathilde Weberg1
1Psychology Department, California State University San Marcos, San Marcos, CA, USA.
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Functional assessment in neurocognitive evaluation is often provided via informant reports. These subjective reports can vary based on the characteristics of informants and their relationships with participants, such as informant sex. However, whether informant sex intersects with participant sex to impact subjective ratings of participants' daily functioning, and whether such effects mirror observed patterns in neuropsychological performance, has not been adequately examined with ethnoracially diverse samples. We examined differences among participant-informant sex-based dyads on subjective informant reports of participants' daily functioning (assessed via the Functional Activities Questionnaire [FAQ]), and whether any observed differences on reported functioning corresponded to differences in objective participant performance on neuropsychological performance, among middle-aged and older Hispanic/Latino (n = 543), non-Hispanic Black (NHB; n = 1030), and non-Hispanic White (NHW; n = 5356) adults in the National Alzheimer's Coordinating Center cohort (n = 6929). Analysis of covariance (ANCOVA) tests revealed significant dyad differences on FAQ scores in the NHB (p<.001) and NHW subsamples (p<.05), but not in the Hispanic/Latino subsample (p>.05). For the Hispanic/Latino and NHB subsamples, ANCOVA tests revealed no significant effects of dyad on neuropsychological performance (ps>.01), whereas for the NHW subsample, ANCOVA tests revealed significant dyad differences on performance in multiple cognitive domains (ps<.01). Nevertheless, the pattern of dyad differences on neuropsychological performance did not mirror the pattern of observed differences on FAQ scores in the NHW subsample. Findings and their implications, including potential contributions of other informant characteristics on observed dyad differences on reported functioning, are discussed.
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