{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T21:30:07Z","timestamp":1779917407185,"version":"3.53.1"},"reference-count":63,"publisher":"Cambridge University Press (CUP)","issue":"4","license":[{"start":{"date-parts":[[2023,10,6]],"date-time":"2023-10-06T00:00:00Z","timestamp":1696550400000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Int Neuropsychol Soc"],"published-print":{"date-parts":[[2024,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec id=\"S1355617723000620_as1\"><jats:title>Objective:<\/jats:title><jats:p>The Cognitive Change Index (CCI-20) is a validated questionnaire that assesses subjective cognitive complaints (SCCs) across memory, language, and executive domains. We aimed to: (a) examine the internal consistency and construct validity of the CCI-20 in patients with movement disorders and (b) learn how the CCI-20 corresponds to objective neuropsychological and mood performance in individuals with Parkinson\u2019s disease (PD) or essential tremor (ET) seeking deep brain stimulation (DBS).<\/jats:p><\/jats:sec><jats:sec id=\"S1355617723000620_as2\"><jats:title>Methods:<\/jats:title><jats:p>216 participants (<jats:italic>N<\/jats:italic> = 149 PD; <jats:italic>N<\/jats:italic> = 67 ET) underwent neuropsychological evaluation and received the CCI-20. The proposed domains of the CCI-20 were examined via confirmatory (CFA) and exploratory (EFA) factor analyses. Hierarchical regressions were used to assess the relationship among subjective cognitive complaints, neuropsychological performance and mood symptoms.<\/jats:p><\/jats:sec><jats:sec id=\"S1355617723000620_as3\"><jats:title>Results:<\/jats:title><jats:p>PD and ET groups were similar across neuropsychological, mood, and CCI-20 scores and were combined into one group who was well educated (<jats:italic>m<\/jats:italic> = 15.01 \u00b1 2.92), in their mid-60\u2019s (<jats:italic>m<\/jats:italic> = 67.72 \u00b1 9.33), predominantly male (63%), and non-Hispanic White (93.6%). Previously proposed 3-domain CCI-20 model failed to achieve adequate fit. Subsequent EFA revealed two CCI-20 factors: memory and non-memory (<jats:italic>p<\/jats:italic> &lt; 0.001; CFI = 0.924). Regressions indicated apathy and depressive symptoms were associated with greater memory and total cognitive complaints, while poor executive function and anxiety were associated with more non-memory complaints.<\/jats:p><\/jats:sec><jats:sec id=\"S1355617723000620_as4\"><jats:title>Conclusion:<\/jats:title><jats:p>Two distinct dimensions were identified in the CCI-20: memory and non-memory complaints. Non-memory complaints were indicative of worse executive function, consistent with PD and ET cognitive profiles. Mood significantly contributed to all CCI-20 dimensions. Future studies should explore the utility of SCCs in predicting cognitive decline in these populations.<\/jats:p><\/jats:sec>","DOI":"10.1017\/s1355617723000620","type":"journal-article","created":{"date-parts":[[2023,10,6]],"date-time":"2023-10-06T08:39:14Z","timestamp":1696581554000},"page":"370-379","source":"Crossref","is-referenced-by-count":0,"title":["Perception of cognitive change by individuals with Parkinson\u2019s disease or essential tremor seeking deep brain stimulation: Utility of the cognitive change index"],"prefix":"10.1017","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1664-3089","authenticated-orcid":false,"given":"Katie","family":"Rodriguez","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rachel N.","family":"Schade","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francesca 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