An Interview-Based Assessment of the Experience of Cognitive Impairment in Multiple Sclerosis: The Cognitive Assessment Interview (CAI).
2021
Abstract Background: Cognitive impairment is a common feature of multiple sclerosis (MS). A semi-structured interview, including informant input, can characterize the experience of individuals living with MS and cognitive involvement. Objective: We administered the Cognitive Assessment Interview (CAI), a patient-and informant-based semi-structured interview, to characterize the experience of cognitive impairments in those living with MS. Methods: Trained raters administered the CAI to a sample of MS participants and their informants enrolled for a trial of cognitive remediation. Cognitive impairments on the CAI were characterized and compared to those captured by neuropsychological and self-report measures. Results: A total of n=109 MS participants (mean age = 50.3 ± 12.2) and their available informants (n=71) were interviewed. Participants reported experiencing processing speed (90/106, 85%), working memory (87/109, 80%) and learning and memory (79/109, 72%) problems most commonly. CAI interview-based ratings were moderately correlated with a self-report measure (Multiple Sclerosis Neuropsychological Screening Questionnaire, rs = .52, p < .001), and only mildly correlated with objective neuropsychological measures specific to executive functions (rs = .21, p = .029). For those with informant interviews, ratings were overall consistent, suggesting that the CAI is valid even in cases in which informant is unavailable and interview is conducted with the patient alone (as is often the case in clinical and research settings). Conclusions: The CAI provides a semi-structured interview to characterize the experience of cognitive impairment in MS, with findings representing real-world functioning that add valuable information to both self-report measures and neuropsychological assessment.
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