Concurrent validity and TEST-RETEST reliability of the incremental shuttle walk TEST in patients with type 2 diabetes mellitus

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dc.contributor.authorUsul, Melis
dc.contributor.authorYıldırım, Gülenay
dc.contributor.authorKayapınar, İlayda
dc.contributor.authorKuran, Aslan Göksen
dc.contributor.authorÖzyılmaz, Semiramis
dc.contributor.authorTunç, Muhammet
dc.date.accessioned2026-11-02T13:01:20Z
dc.date.available2026-11-02T13:01:20Z
dc.date.issued2026
dc.departmentMeslek Yüksekokulları, Meslek Yüksekokulu, Fizyoterapi Programı
dc.description.abstractBackground: Type 2 diabetes mellitus (T2DM) is a chronic metabolic-endocrine disorder characterized by insulin resistance and relative insulin deficiency. Functional capacity is considered a key determinant of the ability to perform activities of daily living and maintain quality of life, and it is frequently impaired in individuals with T2DM. The Incremental Shuttle Walk Test (ISWT) is a low-cost, externally paced field test used to assess maximal exercise capacity; however, evidence regarding its validity and reliability in individuals with T2DM remains limited. Objective: Investigate the concurrent validity of the ISWT against the Six-Minute Walk Test (6MWT) and determine its test-retest reliability in individuals with T2DM. Methods: Twenty-six individuals with T2DM (16 females, 10 males; mean age 56.0 ± 12.02 years) were included. Concurrent validity of the ISWT was assessed by comparison with the 6MWT. Test-retest reliability was evaluated by repeating the measurements after 7 days, provided that participants' clinical condition remained stable. Statistical analyses were performed using SPSS Statistics version 31. Results: The ISWT demonstrated acceptable-to-good test-retest reliability, with an intraclass correlation coefficient ICC3,1 of 0.778 (95% confidence interval: 0.568-0.893; p < .001). No significant difference was found between the first and second measurements (336.54 ± 102.53 m vs. 323.85 ± 84.95 m; t(25) = 1.032; p = .312), indicating that no statistically significant systematic change was observed between the test and retest assessments. The standard error of measurement (SEM) was 48.3 m, and the minimal detectable change at the 95% confidence level (MDC95) was 134.0 m. Conclusion: The ISWT demonstrated acceptable concurrent validity with the 6MWT and good test-retest reliability in individuals with T2DM. Therefore, it may be a useful tool for assessing functional exercise capacity and objectively evaluating functional status in clinical practice. However, SEM and MDC values should be carefully considered when interpreting individual changes in this population.Clinical Trials Number NCT06519318.
dc.identifier.citationUsul, M., Yıldırım, G., Kayapınar, İ., Kuran Aslan, G., Özyılmaz, S., & Tunç, M. (2026). Concurrent validity and test-retest reliability of the incremental shuttle walk test in patients with type 2 diabetes mellitus. Physiotherapy Theory and Practice.
dc.identifier.doi10.1080/09593985.2026.2743105
dc.identifier.issn0959-3985
dc.identifier.pmid42844715
dc.identifier.scopus2-s2.0-105052947876
dc.identifier.urihttps://hdl.handle.net/20.500.12941/477
dc.identifier.volume2026
dc.identifier.wosqualityQ3
dc.indekslendigikaynakPubMed
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorKayapınar, İlayda
dc.language.isoen
dc.publisherTaylor & Francis
dc.relation.ispartofPhysiotherapy: Theory and Practice
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectExercise Test
dc.subjectExercise Tolerance
dc.subjectType 2 Diabetes Mellitus
dc.subjectWalking
dc.titleConcurrent validity and TEST-RETEST reliability of the incremental shuttle walk TEST in patients with type 2 diabetes mellitus
dc.typeArticle

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