Construct validity and reliability of the 2-minute step test in patients with lumbar spinal stenosis

PAKER N., Şirin Ahısha B., KESİKTAŞ F. N., Buğdaycı N. D., Soluk Özdemir Y.

Disability and Rehabilitation, cilt.47, sa.14, ss.3708-3713, 2025 (SCI-Expanded, SSCI, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 47 Sayı: 14
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1080/09638288.2024.2428824
  • Dergi Adı: Disability and Rehabilitation
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Social Sciences Citation Index (SSCI), Scopus, CINAHL, Educational research abstracts (ERA), MEDLINE, Psycinfo, Public Affairs Index, Violence & Abuse Abstracts
  • Sayfa Sayıları: ss.3708-3713
  • Anahtar Kelimeler: Spinal stenosis, exercise test, physical fitness
  • Sağlık Bilimleri Üniversitesi Adresli: Evet

Özet

Aim: This study aimed to investigate the validity and reliability of the 2-Minute Step Test (2MST) in patients with lumbar spinal stenosis (LSS). Method: This cross-sectional study involved 55 volunteers, aged 18–80, diagnosed with lumbar spinal stenosis. The participants were assessed using the 2MST, the 2-Minute Walk Test (2MWT), the 6-Minute Walk Test (6MWT), the Visual Analogue Scale (VAS), and the Oswestry Disability Index (ODI). To evaluate the reliability of the 2MST, test-retest reliability was determined by administering the 2MST again after a 7-day interval. The reliability analysis included the intraclass correlation coefficient (ICC) with a 95% confidence interval (CI), standard error of measurement (SEM), and minimum detectable change at the 95% confidence level (MDC95). For concurrent validity, the correlations of the 2MST with the 2MWT, 6MWT, and ODI were assessed. Results: The 2MST exhibited excellent test-retest reliability (ICC = 0.94, SEM = 5.56, MDC95=15.41) in LSS patients. Additionally, the 2MST showed significant correlations with the 2MWT (r = 0.842, p < 0.001), 6MWT (r = 0.819, p < 0.001), and ODI score (r = −0.722, p < 0.001). Conclusion: This study demonstrated that the 2MST is a valid and reliable tool for assessing exercise capacity in individuals with LSS. ClinicalTrials.gov ID: NCT06060821.