{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T23:56:01Z","timestamp":1785455761073,"version":"3.56.0"},"reference-count":20,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2016,11,22]],"date-time":"2016-11-22T00:00:00Z","timestamp":1479772800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Movement Disorders"],"published-print":{"date-parts":[[2017,3]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p><jats:bold>Objective<\/jats:bold>: To assess the psychometric properties of the Carers Quality of Life Questionnaire for Parkinsonism using a Rasch modeling approach and determine the optimal cut\u2010off score.<\/jats:p><jats:p><jats:bold>Methods<\/jats:bold>: We performed a Rasch analysis of the survey answers of 430 carers of patients with atypical parkinsonism.<\/jats:p><jats:p><jats:bold>Results<\/jats:bold>: All of the scale items demonstrated acceptable goodness of fit to the Rasch model. The scale was unidimensional and no notable differential item functioning was detected in the items regarding age and disease type. Rating categories were functioning adequately in all scale items. The scale had high reliability (.95) and construct validity and a high degree of precision, distinguishing between 5 distinct groups of carers with different levels of quality of life. A cut\u2010off score of 62 was found to have the optimal screening accuracy based on Hospital Anxiety and Depression Scale subscores.<\/jats:p><jats:p><jats:bold>Conclusion<\/jats:bold>: The results suggest that the Carers Quality of Life Questionnaire for Parkinsonism is a useful scale to assess carers' quality of life and allows analyses requiring interval scaling of variables. \u00a9 2016 International Parkinson and Movement Disorder Society<\/jats:p>","DOI":"10.1002\/mds.26877","type":"journal-article","created":{"date-parts":[[2016,11,22]],"date-time":"2016-11-22T00:44:08Z","timestamp":1479775448000},"page":"463-466","source":"Crossref","is-referenced-by-count":6,"title":["Rasch analysis of the carers quality of life questionnaire for parkinsonism"],"prefix":"10.1002","volume":"32","author":[{"given":"Marios","family":"Pillas","sequence":"first","affiliation":[{"name":"University College London Institute of Neurology, University College London, Department of Clinical Neurosciences London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Caroline","family":"Selai","sequence":"additional","affiliation":[{"name":"University College London Institute of Neurology, University College London, Department of Clinical Neurosciences London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anette","family":"Schrag","sequence":"additional","affiliation":[{"name":"University College London Institute of Neurology, University College London, Department of Clinical Neurosciences London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2016,11,22]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11136-015-1071-y"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0447.1983.tb09716.x"},{"key":"e_1_2_9_4_1","volume-title":"The Hospital Anxiety and Depression Scale manual","author":"Snaith RP","year":"1994"},{"key":"e_1_2_9_5_1","volume-title":"Winsteps Rasch measurement computer software program (version 3.91.2)","author":"Linacre JM","year":"2015"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF02293814"},{"key":"e_1_2_9_7_1","first-page":"85","article-title":"Optimizing rating scale category effectiveness","volume":"3","author":"Linacre JM","year":"2002","journal-title":"J Appl Meas"},{"key":"e_1_2_9_8_1","volume-title":"A user's guide to Winsteps Ministep Rasch model computer programs. Program manual 3.92.0","author":"Linacre JM","year":"2016"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.4324\/9781315814698"},{"key":"e_1_2_9_10_1","volume-title":"Educational Statistics laboratory. Memo 25","author":"Draba RE","year":"1977"},{"key":"e_1_2_9_11_1","first-page":"1070","article-title":"An adjustment for sample size in DIF analysis","volume":"20","author":"Tristan A","year":"2006","journal-title":"RMT"},{"key":"e_1_2_9_12_1","first-page":"387","article-title":"Assessment of differential item functioning","volume":"9","author":"Wang WC","year":"2008","journal-title":"J Appl Meas"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jad.2014.06.019"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1080\/1034912X.2010.524428"},{"key":"e_1_2_9_15_1","first-page":"4","article-title":"When to stop removing items and persons in Rasch misfit analysis","volume":"23","author":"Linacre JM","year":"2010","journal-title":"RMT"},{"key":"e_1_2_9_16_1","volume-title":"Making measures","author":"Wright BD","year":"2004"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jclinepi.2010.02.012"},{"key":"e_1_2_9_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2013.10.040"},{"issue":"4","key":"e_1_2_9_19_1","first-page":"463","article-title":"Current issues in psychometric assessment of outcomes measures","volume":"48","author":"Franchignoni F","year":"2012","journal-title":"Medicina Fluminensis"},{"key":"e_1_2_9_20_1","doi-asserted-by":"publisher","DOI":"10.1097\/MRR.0000000000000043"},{"key":"e_1_2_9_21_1","first-page":"97","article-title":"Instrument development tools and activities for measure validation using Rasch models: part I, instrument development tools","volume":"8","author":"Wolfe EW","year":"2007","journal-title":"J Appl Meas"}],"container-title":["Movement Disorders"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fmds.26877","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/mds.26877","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/mds.26877","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/movementdisorders.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/mds.26877","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T14:03:45Z","timestamp":1760969025000},"score":1,"resource":{"primary":{"URL":"https:\/\/movementdisorders.onlinelibrary.wiley.com\/doi\/10.1002\/mds.26877"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,11,22]]},"references-count":20,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2017,3]]}},"alternative-id":["10.1002\/mds.26877"],"URL":"https:\/\/doi.org\/10.1002\/mds.26877","archive":["Portico"],"relation":{},"ISSN":["0885-3185","1531-8257"],"issn-type":[{"value":"0885-3185","type":"print"},{"value":"1531-8257","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,11,22]]}}}