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Journal article
The McCusker Subjective Cognitive Impairment Inventory (McSCI): a novel measure of perceived cognitive decline
Age and Ageing, Vol.53(7), afae138
2024
Abstract
Background: Subjective cognitive decline (SCD), i.e. self/other-reported concerns on one's cognitive functioning without objective evidence of significant decline, is an indicator of dementia risk. There is little consensus on reliability and validity of the available SCD measures. Therefore, introducing a novel and psychometrically sound measure of SCD is timely.
Objective: The psychometric properties of a new SCD measure, the McCusker Subjective Cognitive Impairment Inventory– Self-Report (McSCI-S), are reported.
Methods: Through review of previously published measures as well as our clinical and research data on people with SCD, we developed a 46-item self-report questionnaire to assess concerns on six cognitive domains, namely, memory, language, orientation, attention and concentration, visuoconstruction abilities and executive function. The McSCI-S was examined in a cohort of 526 participants using factor analysis, item response theory analysis and receiver operating characteristic (ROC) curve.
Results: A unidimensional model provided acceptable fit (CFI = 0.94, TLI = 0.94, RMSEA [90% CI] = 0.052 [.049, 0.055], WRMR = 1.45). The McSCI-S internal consistency was excellent (.96). A cutoff score of ≥24 is proposed to identify participants with SCDs. Higher McSCI-S scores were associated with poorer general cognition, episodic verbal memory, executive function and greater memory complaints and depressive scores (P < .001), controlling for age, sex and education.
Conclusions: Excellent reliability and construct validity suggest the McSCI-S estimates SCDs with acceptable accuracy while capturing self-reported concerns for various cognitive domains. The psychometric analysis indicated that this measure can be used in cohort studies as well as on individual, clinical settings to assess SCDs.
Details
- Title
- The McCusker Subjective Cognitive Impairment Inventory (McSCI): a novel measure of perceived cognitive decline
- Authors/Creators
- Hamid Sohrabi (Corresponding Author) - Murdoch University, Centre for Healthy AgeingBrandon Gavett - The University of Western AustraliaMichael Weinborn - The University of Western AustraliaCraig P. SpeelmanRomola S Bucks - The University of Western AustraliaRalph Martins
- Publication Details
- Age and Ageing, Vol.53(7), afae138
- Publisher
- Oxford University Press on behalf of the British Geriatrics Society. All rights reserved.
- Identifiers
- 991005683570307891
- Copyright
- © The Author(s) 2024.
- Murdoch Affiliation
- Centre for Healthy Ageing; School of Psychology
- Language
- English
- Resource Type
- Journal article
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