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Instruments to Assess Cognitive Reserve Among Older Adults: a Systematic Review of Measurement Properties

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Abstract

Cognitive reserve explains the differences in the susceptibility to cognitive impairment related to brain aging, pathology, or insult. Given that cognitive reserve has important implications for the cognitive health of typically and pathologically aging older adults, research needs to identify valid and reliable instruments for measuring cognitive reserve. However, the measurement properties of current cognitive reserve instruments used in older adults have not been evaluated according to the most up-to-date COnsensus-based Standards for the selection of health status Measurement INstruments (COSMIN). This systematic review aimed to critically appraise, compare, and summarize the quality of the measurement properties of all existing cognitive reserve instruments for older adults. A systematic literature search was performed to identify relevant studies published up to December 2021, which was conducted by three of four researchers using 13 electronic databases and snowballing method. The COSMIN was used to assess the methodological quality of the studies and the quality of measurement properties. Out of the 11,338 retrieved studies, only seven studies that concerned five instruments were eventually included. The methodological quality of one-fourth of the included studies was doubtful and three-seventh was very good, while only four measurement properties from two instruments were supported by high-quality evidence. Overall, current studies and evidence for selecting cognitive reserve instruments suitable for older adults were insufficient. All included instruments have the potential to be recommended, while none of the identified cognitive reserve instruments for older adults appears to be generally superior to the others. Therefore, further studies are recommended to validate the measurement properties of existing cognitive reserve instruments for older adults, especially the content validity as guided by COSMIN.

Systematic Review Registration numbers: CRD42022309399 (PROSPERO).

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All data generated or analyzed during this study are included in this published article and its supplementary files.

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Funding

This work was supported by the School of Nursing of Peking Union Medical College [grant number: PUMCSON202101].

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Wanrui Wei: Conceptualization, Methodology, Validation, Formal analysis, Data Curation, Writing - Original Draft, Review & Editing, Project administration. Kairong Wang: Methodology, Validation, Formal analysis, Data Curation, Writing - Review & Editing. Jiyuan Shi: Methodology, Validation, Formal analysis, Data Curation, Writing - Review & Editing. Zheng Li: Supervision, Conceptualization, Methodology, Validation, Formal analysis, Data Curation, Writing - Review & Editing, Funding acquisition, Project administration.

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Correspondence to Zheng Li.

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Wei, W., Wang, K., Shi, J. et al. Instruments to Assess Cognitive Reserve Among Older Adults: a Systematic Review of Measurement Properties. Neuropsychol Rev (2023). https://doi.org/10.1007/s11065-023-09594-3

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