Construct validity and reliability of the 2-Minute Step Test (2MST) in individuals with low back pain

Sulamizia Filomena Costa de Jesus, Daniela Bassi-Dibai, André Pontes-Silva, Aliny da Silva de Araujo, Silvana de Freitas Faria Silva, Christiano Eduardo Veneroso, Cid André Fidelis de Paula Gomes, Almir Vieira Dibai-Filho, Sulamizia Filomena Costa de Jesus, Daniela Bassi-Dibai, André Pontes-Silva, Aliny da Silva de Araujo, Silvana de Freitas Faria Silva, Christiano Eduardo Veneroso, Cid André Fidelis de Paula Gomes, Almir Vieira Dibai-Filho

Abstract

Background: Functional tests are important clinical tools, since they are non-invasive methods, with simple applicability, and low cost. However, there are few tests adapted for individuals with chronic low back pain. Thus, our objective was to evaluate the test-retest and inter-rater reliability of the 2-Minute Step Test in individuals with chronic low back pain and to correlate the test score with measures of pain and physical activity.

Methods: We included patients aged between 18 and 45 years, of both sexes, and with low back pain. The interval between the test and retest was 7 days. We analyzed the data via intra-class correlation coefficient (ICC), confidence interval at 95%, standard error of measurement, and minimum detectable change for reliability. We used the Spearman's correlation coefficient to verify the correlation between 2-Minute Step Test and measures of pain and physical activity (Numerical Pain Scale, Roland-Morris Disability Questionnaire, Pain-Related Catastrophizing Thoughts Scale, Tampa Scale of Kinesiophobia, and Baecke Habitual Physical Activity Questionnaire).

Results: Sample is composed of 37 individuals, most of them female, with overweight and low back pain > 60 months. 2-Minute Step Test showed excellent test-retest (ICC = 0.903) and inter-rater (ICC = 0.925) reliability. Sport domain of the Baecke showed a significant correlation with the 2-Minute Step Test (rho = 0.444).

Conclusion: 2-Minute Step Test is a reliable measure to measure the functional capacity of patients with chronic low back pain considering different times and examiners, as well as being positively correlated with sports practice.

Keywords: Cardiorespiratory Fitness; Chronic pain; Musculoskeletal disorders; Reproducibility of results.

Conflict of interest statement

AVDF and CAFPG are Associate Editors of the BMC Musculoskeletal Disorders. The other authors declare that they have no competing interests.

© 2022. The Author(s).

Figures

Fig. 1
Fig. 1
Correlation between the 2-Minute Step Test (2MST) and the sport domain of the Baecke Habitual Physical Activity Questionnaire (BQ)

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Source: PubMed

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