{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,20]],"date-time":"2026-02-20T15:39:13Z","timestamp":1771601953562,"version":"3.50.1"},"reference-count":22,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2019,12,3]],"date-time":"2019-12-03T00:00:00Z","timestamp":1575331200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100000304","name":"Parkinson's UK","doi-asserted-by":"publisher","award":["J1101"],"award-info":[{"award-number":["J1101"]}],"id":[{"id":"10.13039\/501100000304","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100007431","name":"Neurosciences Research Foundation","doi-asserted-by":"publisher","award":["173503"],"award-info":[{"award-number":["173503"]}],"id":[{"id":"10.13039\/100007431","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Int J Geriat Psychiatry"],"published-print":{"date-parts":[[2020,2]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>The Montreal Cognitive Assessment (MoCA) is a common tool for screening mild cognitive impairment (MCI) and dementia. Studies in multiple clinical groups provide evidence for various factor structures mapping to different cognitive domains. We tested the factor structure of the MoCA in a large cohort of early Parkinson disease (PD).<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Complete MoCA data were available from an observational cohort study for 1738 patients with recent\u2010onset PD (64.6% male, mean age 67.6, SD 9.2). Confirmatory factor analysis (CFA) was applied to test previously defined two\u2010factor, six\u2010factor, and three\u2010factor models in the full sample and in a subgroup with possible cognitive impairment (MoCA &lt; 26). Secondary analysis used exploratory factor analysis (EFA; principal factors with oblique rotation).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The mean MoCA score was 25.3 (SD 3.4, range 10\u201030). Fit statistics in the six\u2010factor model (<jats:italic>\u03c7<\/jats:italic><jats:sup>2<\/jats:sup>\/<jats:italic>df<\/jats:italic> 17.77, root mean square error of approximation [RMSEA] 0.10, comparative fit index [CFI] 0.74, Tucker\u2010Lewis index [TLI] 0.69, standardised root mean square residual [SRMR] 0.07) indicated poorer fit than did previous studies. Findings were similar in the two\u2010factor and three\u2010factor models. EFA suggested an alternative six\u2010factor solution (short\u2010term recall, visuospatial\u2010executive, attention\/working memory, verbal\u2010executive, orientation, and expressive language), although CFA did not support the validity of the new model.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The factor structure of the MoCA in early PD was not consistent with that of previous research. This may reflect higher cognitive performance and differing demographics in our sample. The results do not support a clear, clinically relevant factor structure in an early PD group, suggesting that the MoCA should be followed with detailed assessment to obtain domain\u2010specific cognitive profiles.<\/jats:p><\/jats:sec>","DOI":"10.1002\/gps.5234","type":"journal-article","created":{"date-parts":[[2019,11,18]],"date-time":"2019-11-18T04:50:53Z","timestamp":1574052653000},"page":"188-194","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Factor structure of the <scp>Montreal Cognitive Assessment<\/scp> in <scp>Parkinson<\/scp> disease"],"prefix":"10.1002","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8536-7597","authenticated-orcid":false,"given":"Callum R.","family":"Smith","sequence":"first","affiliation":[{"name":"Institute of Neuroscience and Psychology University of Glasgow  Glasgow UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonathan","family":"Cavanagh","sequence":"additional","affiliation":[{"name":"Institute of Health and Wellbeing University of Glasgow  Glasgow UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matthew","family":"Sheridan","sequence":"additional","affiliation":[{"name":"Division of Old Age Psychiatry NHS Greater Glasgow and Clyde  Glasgow UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Katherine A.","family":"Grosset","sequence":"additional","affiliation":[{"name":"Department of Neurology Queen Elizabeth University Hospital  Glasgow UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Breda","family":"Cullen","sequence":"additional","affiliation":[{"name":"Institute of Health and Wellbeing University of Glasgow  Glasgow UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Donald G.","family":"Grosset","sequence":"additional","affiliation":[{"name":"Department of Neurology Queen Elizabeth University Hospital  Glasgow UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2019,12,3]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1532-5415.2005.53221.x"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1001\/archneurol.2009.266"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00702-016-1589-3"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jstrokecerebrovasdis.2012.01.001"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00702-016-1517-6"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.0b013e3181c34b47"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.0b013e3181f39d0e"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.20527"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.parkreldis.2014.07.004"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.20726"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.22017"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.24893"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00415-009-5399-5"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1017\/S1355617711001573"},{"key":"e_1_2_9_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.parkreldis.2017.02.008"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.parkreldis.2017.05.023"},{"key":"e_1_2_9_18_1","doi-asserted-by":"publisher","DOI":"10.3233\/JPD-150662"},{"issue":"1","key":"e_1_2_9_19_1","first-page":"25","article-title":"Declaration of Helsinki. 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