{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T18:45:54Z","timestamp":1792262754786,"version":"4.4.0"},"reference-count":32,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2023,5,18]],"date-time":"2023-05-18T00:00:00Z","timestamp":1684368000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/100008734","name":"Mitsui Sumitomo Insurance Welfare Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100008734","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Physiotherapy Res Intl"],"published-print":{"date-parts":[[2023,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background and Purpose<\/jats:title><jats:p>To improve existing clinical assessments for freezing of gait (FOG) severity, a new clinician\u2010rated tool which integrates the varied types of freezing (FOG Severity Tool\u2010Revised) was developed. This cross\u2010sectional study investigated its validity and reliability.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>People with Parkinson's disease who were able to independently ambulate eight\u2010metres and understand study instructions were consecutively recruited from outpatient clinics of a tertiary hospital. Those with co\u2010morbidities severely affecting gait were excluded. Participants were assessed with the FOG Severity Tool\u2010Revised, three functional performance tests, the FOG Questionnaire, and outcomes measuring anxiety, cognition, and disability. The FOG Severity Tool\u2010Revised was repeated for test\u2010retest reliability. Exploratory factor analysis and Cronbach's alpha were computed for structural validity and internal consistency. Reliability and measurement error were estimated with ICC (two\u2010way, random), standard error of measurement, and smallest detectable change (SDC<jats:sub>95<\/jats:sub>). Criterion\u2010related and construct validity were calculated with Spearman's correlations.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Thirty\u2010nine participants were enrolled [79.5% (<jats:italic>n<\/jats:italic>\u00a0=\u00a031) male; Median (IQR): age\u201373.0 (9.0) years; disease duration\u20134.0 (5.8) years], with fifteen (38.5%) who reported no medication state change contributing a second assessment for reliability estimation. The FOG Severity Tool\u2010Revised demonstrated sufficient structural validity and internal consistency (<jats:italic>\u03b1<\/jats:italic>\u00a0=\u00a00.89\u20130.93), and adequate criterion\u2010related validity compared to the FOG Questionnaire (<jats:italic>\u03c1<\/jats:italic>\u00a0=\u00a00.73, 95% CI 0.54\u20130.85). Test\u2010retest reliability (ICC\u00a0=\u00a00.96, 95%CI 0.86\u20130.99) and random measurement error (%SDC<jats:sub>95<\/jats:sub>\u00a0=\u00a010.4%) was acceptable in this limited sample.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion and Conclusions<\/jats:title><jats:p>The FOG Severity Tool\u2010Revised appeared valid in this initial sample of people with Parkinson's. While its psychometric properties remain to be confirmed in a larger sample, it may be considered for use in the clinical setting.<\/jats:p><\/jats:sec>","DOI":"10.1002\/pri.2016","type":"journal-article","created":{"date-parts":[[2023,5,18]],"date-time":"2023-05-18T10:24:53Z","timestamp":1684405493000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Scoring festination and gait freezing in people with Parkinson's: The freezing of gait severity tool\u2010revised"],"prefix":"10.1002","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4578-2048","authenticated-orcid":false,"given":"Aileen E.","family":"Scully","sequence":"first","affiliation":[{"name":"School of Physiotherapy and Exercise Science Curtin University  Bentley Western Australia Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dawn","family":"Tan","sequence":"additional","affiliation":[{"name":"Health and Social Sciences Singapore Institute of Technology  Singapore Singapore"},{"name":"Department of Physiotherapy Singapore General Hospital  Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Beatriz Ito Ramos de","family":"Oliveira","sequence":"additional","affiliation":[{"name":"School of Physiotherapy and Exercise Science Curtin University  Bentley Western Australia Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keith D.","family":"Hill","sequence":"additional","affiliation":[{"name":"Rehabilitation, Ageing and Independent Living (RAIL) Research Centre Monash University  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ross","family":"Clark","sequence":"additional","affiliation":[{"name":"School of Health University of the Sunshine Coast  Sunshine Coast Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong Hao","family":"Pua","sequence":"additional","affiliation":[{"name":"Department of Physiotherapy Singapore General Hospital  Singapore Singapore"},{"name":"Medicine Academic Programme Duke\u2010NUS Graduate Medical School  Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,5,18]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.3233\/JPD\u2010160927"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.3109\/09638288.2012.709910"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/awp053"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1080\/09638288.2022.2060334"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.28887"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.26762"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1017\/CBO9780511996214"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.apmr.2011.04.008"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.clinph.2017.07.399"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0216065"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1353\u20108020(99)00062\u20100"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.21745"},{"key":"e_1_2_10_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.22340"},{"key":"e_1_2_10_15_1","doi-asserted-by":"publisher","DOI":"10.2106\/jbjs.Oa.19.00015"},{"key":"e_1_2_10_16_1","doi-asserted-by":"publisher","DOI":"10.1002\/mds.22330"},{"key":"e_1_2_10_17_1","volume-title":"Multivariate data analysis","author":"Hair J. 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