• Anıl Özüdoğru, Mehmet Canlı, İsmail Ceylan, Şafak Kuzu, Halil Alkan, and Başak Çiğdem Karaçay.
• School of Physical Therapy and Rehabilitation, Ahi Evran University, Kirşehir, Turkey.
• Ir J Med Sci. 2023 Aug 1; 192 (4): 190319081903-1908.

Purpose/AimThe Five Times Sit-to-Stand Test (FTSST) is a method that evaluates lower extremity muscle strength and balance level. The aim of this study is to test the validity and reliability of the FTSST in patients with non-specific chronic low back pain (NSCLBP) whose lower extremity muscle strength and balance levels are adversely affected.MethodsThe first outcome measure of the study was the FTSST, which was conducted by two different researchers. Secondary outcome measures are Biodex Balance System (BBS), Quadriceps Muscle Strength Test, Oswestry Disability Index (ODI), and Visual Analogue Scale (VAS). Intraclass Correlation Coefficient (ICC) was used for the validity and reliability of the FTSST, which was made by two different researchers, and Pearson's Correlation Analysis was used to determine its relationship with other measurements.ResultsInter-rater and test-retest reliability for the FTSST were excellent (Intraclass Correlation Coefficient = 0.99). A statistically significant correlation was found between all secondary outcome measures (BBS, quadriceps muscle strength, ODI, VAS) and FTSST (p < 0.05).ConclusionIn line with the findings of our study, we think that FTSST is a simple, easy, and reproducible method for evaluating lower extremity muscle strength, balance level, functional status, and pain in patients with NSCLBP.© 2022. The Author(s), under exclusive licence to Royal Academy of Medicine in Ireland.

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