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Structural validity was explored using factor analysis, and internal consistency by calculating Cronbach <jats:italic>\u03b1<\/jats:italic>.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Confirmatory factor analysis revealed a suitable 2\u2010factor model for Patient Health Questionnaire\u20108, with Cronbach <jats:italic>\u03b1<\/jats:italic> of 0.89, and 0.86. One and 2\u2010factor models were suitable for General Anxiety Disorder\u20107, with overall Cronbach <jats:italic>\u03b1<\/jats:italic> of 0.93 for the 1\u2010factor model, and 0.91 and 0.84 for both factors in a 2\u2010factor model. A 4\u2010factor solution was appropriate for Patient Health Questionnaire\u201015, with Cronbach <jats:italic>\u03b1<\/jats:italic> of 0.72, 0.57, 0.71 and 0.73 for each factor separately. Exploratory factor analysis was conducted to explore the factor structure of Jaw Functional Limitation Scale 20, and a 3\u2010factor solution was appropriate.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>This study provides positive evidence of structural validity and internal consistency of these questionnaires in patients with pain of temporomandibular disorders. However, additional testing is required to explore further psychometric properties.<\/jats:p><\/jats:sec>","DOI":"10.1111\/odi.14729","type":"journal-article","created":{"date-parts":[[2023,10,6]],"date-time":"2023-10-06T17:36:35Z","timestamp":1696613795000},"page":"2473-2484","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Validity and internal consistency of four scales in patients with <scp>TMD<\/scp>: <scp>PHQ8<\/scp>, <scp>GAD7<\/scp>, <scp>PHQ15<\/scp> and <scp>JFLS20<\/scp>"],"prefix":"10.1111","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9907-0647","authenticated-orcid":false,"given":"Dina","family":"Taimeh","sequence":"first","affiliation":[{"name":"Department of Maxillofacial Medicine and Surgery UCL Eastman Dental Institute, University College London  London UK"},{"name":"Department of Oral and Maxillofacial Surgery, Oral Medicine and Periodontology, Faculty of Dentistry University of Jordan  Amman Jordan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Richeal Ni","family":"Riordain","sequence":"additional","affiliation":[{"name":"Department of Maxillofacial Medicine and Surgery UCL Eastman Dental Institute, University College London  London UK"},{"name":"Oral Medicine Unit Cork University Dental School and Hospital  Cork Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9006-9412","authenticated-orcid":false,"given":"Stefano","family":"Fedele","sequence":"additional","affiliation":[{"name":"Department of Maxillofacial Medicine and Surgery UCL Eastman Dental Institute, University College London  London UK"},{"name":"Oral Medicine Unit, Eastman Dental Hospital University College London Hospitals Trust  London UK"},{"name":"NIHR University College London Hospitals Biomedical Research Centre  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rachel","family":"Leeson","sequence":"additional","affiliation":[{"name":"Department of Maxillofacial Medicine and Surgery UCL Eastman Dental Institute, University College London  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,10,5]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.11607\/ofph.1675"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/joor.12685"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jad.2019.09.077"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1207\/s15327906mbr0102_10"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpsychores.2012.12.012"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/sj.bdj.2013.950"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpain.2011.08.004"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1097\/htr.0000000000000177"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpain.2016.01.001"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jad.2017.04.026"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1080\/08869634.2020.1853309"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpain.2011.08.007"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.4135\/9781544339900"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10995\u2010017\u20102396\u20107"},{"key":"e_1_2_9_16_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11136\u2010021\u201002822\u20104"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jdent.2010.01.003"},{"key":"e_1_2_9_18_1","doi-asserted-by":"publisher","DOI":"10.5243\/jsswr.2012.6"},{"key":"e_1_2_9_19_1","volume-title":"Multivariate data analysis (4th ed.): With readings","author":"Hair J. 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