Repeatability and validity of a standardised maximal step-up test for leg function-a diagnostic accuracy studyReport as inadecuate




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BMC Musculoskeletal Disorders

, 12:191

Rehabilitation, physical therapy and occupational health

Abstract

BackgroundObjectively assessed physical performance is a strong predictor for morbidity and premature death and there is an increasing interest in the role of sarcopenia in many chronic diseases.
There is a need for robust and valid functional tests in clinical practice.
Therefore, the repeatability and validity of a newly developed maximal step up test MST was assessed.

MethodsThe MST, assessing maximal step-up height MSH in 3-cm increments, was evaluated in 60 healthy middle-aged subjects, 30 women and 30 men.
The repeatability of MSH and the correlation between MSH and isokinetic knee extension peak torque IKEPT, self-reported physical function SF-36, PF, patient demographics and self-reported physical activity were investigated.

ResultsThe repeatability between occasions and between testers was 6 cm.
MSH range 12-45 cm was significantly correlated to IKEPT, r = 0.68, P < 0.001, SF-36 PF score, r = 0.29, P = 0.03, sex, age, weight and BMI.
The results also show that MSH above 32 cm discriminates subjects in our study with no limitation in self-reported physical function.

ConclusionsThe standardised MST is considered a reliable leg function test for clinical practice.
The MSH was related to knee extension strength and self-reported physical function.
The precision of the MST for identification of limitations in physical function needs further investigation.

Electronic supplementary materialThe online version of this article doi:10.1186-1471-2474-12-191 contains supplementary material, which is available to authorized users.

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Author: Lillemor A Nyberg - Mai-Lis Hellénius - Jan Kowalski - Per Wändell - Peter Andersson - Carl Johan Sundberg

Source: https://link.springer.com/



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