The Reliability and Validity of DrGoniometer, a Smartphone Application for Measuring Elbow Flexion

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dc.authorid0009-0008-3286-2074
dc.contributor.authorSahbaz, Yasemin
dc.contributor.authorIlez, Ali
dc.contributor.authorBatur, Nergiz
dc.date.accessioned2026-01-31T15:08:36Z
dc.date.available2026-01-31T15:08:36Z
dc.date.issued2026
dc.departmentİstanbul Beykent Üniversitesi
dc.description.abstractThis study evaluated the reliability and validity of the DrGoniometer smartphone application for measuring elbow flexion compared to the Universal Goniometer (UG). Fifty-six healthy participants were assessed by two physiotherapists, with anatomical landmarks marked by an independent examiner. Intra- and inter-rater reliability were calculated using intraclass correlation coefficients (ICC), and measurement error was assessed via the standard error of measurement (SEM) and Bland - Altman analysis. DrGoniometer showed excellent intra-rater reliability (ICC = 0.99; SEM = 0.69 degrees) and higher inter-rater reliability (ICC = 0.87; SEM = 1.28 degrees) than UG (ICC = 0.54; SEM = 3.87 degrees). Cronbach's alpha values were also higher for DrG (0.929) than UG (0.704). Although Bland - Altman plots indicated no systematic bias, they revealed wide limits of agreement, suggesting limited interchangeability between tools. These findings support the DrGoniometer as a reliable tool for elbow flexion assessment, especially in contexts requiring high intra-rater consistency and digital precision.
dc.identifier.doi10.1080/1091367X.2025.2538249
dc.identifier.endpage94
dc.identifier.issn1091-367X
dc.identifier.issn1532-7841
dc.identifier.issue1
dc.identifier.scopus2-s2.0-105011746457
dc.identifier.scopusqualityQ1
dc.identifier.startpage87
dc.identifier.urihttps://doi.org./10.1080/1091367X.2025.2538249
dc.identifier.urihttps://hdl.handle.net/20.500.12662/10690
dc.identifier.volume30
dc.identifier.wosWOS:001533765300001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherRoutledge Journals, Taylor & Francis Ltd
dc.relation.ispartofMeasurement in Physical Education And Exercise Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260128
dc.subjectElbow flexion
dc.subjectsmartphone-based goniometry
dc.subjectreliability
dc.subjectvalidity
dc.titleThe Reliability and Validity of DrGoniometer, a Smartphone Application for Measuring Elbow Flexion
dc.typeArticle

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