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O4‐10‐02: Cross‐cultural differences in instrumental activities of daily living (IADL): Translations and adaptations of the amsterdam iadl questionnaire
Author(s) -
Sikkes Sietske,
Pera Aafke,
Vries Saskia,
Maruff Paul,
Cysique Lucette,
Bakardjian Hova,
Dubois Bruno,
Scheltens Philip
Publication year - 2015
Publication title -
alzheimer's and dementia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.713
H-Index - 118
eISSN - 1552-5279
pISSN - 1552-5260
DOI - 10.1016/j.jalz.2015.07.400
Subject(s) - activities of daily living , psychology , comprehension , clarity , construct (python library) , dementia , adaptation (eye) , cross cultural studies , cognitive psychology , population , gerontology , developmental psychology , applied psychology , clinical psychology , linguistics , medicine , computer science , social psychology , disease , psychiatry , pathology , biochemistry , chemistry , neuroscience , programming language , philosophy , environmental health
MCI (57.2%), or AD (13.4%) by consensus. We estimated a twoparameter logistic graded response model using MoCA item-level data. Differential item functioning (DIF) was examined using the program IRTLRDIF. Results: IRT analysis revealed that most MoCA items have high factor loadings (standardized [N(0,1)] r’s>0.6), suggesting most are correlated well with the latent trait (Fig. A, y-axis), and have a desirably broad spread in item difficulty (Fig. A, x-axis). DIF by sex indicated that men were more likely to answer Serial 7, Trails B, and Watch items correctly across all levels of cognitive ability (Fig B), while women were more likely to answer Numbers and Face-Delayed Recall (at higher levels of ability) correctly. DIF by education was significant for the Fluency, Abstraction, Cube, Hand, and Year items; individuals with >12 years of education were more likely to provide correct responses on these items controlling for cognitive ability (Fig. C). DIF by diagnosis showed that Normal Controls provided correct responses to orientation items (i.e. Date, Day, Place) than MCI/AD participants regardless of cognitive ability (Fig. D). Conclusions: This study supports the MoCA’s desirable psychometric properties as a test of global cognitive function within ADNI. It has certain items that perform differently by sex, years of education, and diagnosis, although an assessment of salient DIF revealed a minimal effect of DIF on scores overall. These findings may inform the use and psychometric refinement of the MoCA in this setting.