Inger Mechlenburg

Inter-tester Reliability of the Hand-held dynamometer and the Leg Extensor Power Rig applied on Patients after Total Hip Arthroplasty

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INTRODUCTION: Rehabilitation has an increasing focus on intensive resistance training early after joint replacement (1,2). This increases the requests for measuring changes in the muscle strength and muscle power over time. Hand-held dynamometer (HHD) is a device used to measure isometric muscle strength and Leg Extensor Power Rig (LEPR) is a tool for measuring muscle power.
OBJECTIVES: To test the inter-tester reliability of the HHD in hip abduction and the LEPR in Total Hip
Arthroplasty (THA) patients.
METHODS: Two groups each consisting 20 subjects were included. Mean age was 68.4 years. All subjects had THA surgery three months prior to testing. The subjects conducted two test sessions with HHD and LEPR, with two different testers, separated by a break of 1½ hour. We assessed the relative inter-tester reliability with Intraclass Correlation Coefficient (ICC) and the absolute reliability with Limits of Agreement (LOA).
RESULTS: Inter-tester reliability for the HHD: There was no significant difference between the two testers (p=0.66) and the two tests (0.41); ICC=0.94 (95% CI: 0.86;0.97) ; LOA=±18 Newton. Inter-tester reliability for the LEPR: There was no significant difference between the two testers (p=0.62) and the two tests (0.14); ICC=0.91 (95% CI: 0.79;0.96); LOA=±34Watt.
CONCLUSION: The relative reliability was acceptable for both HHD and LEPR. The absolute reliability showed that a change in the muscle strength/power above 18 Newton or 34 Watt can be counted as a real change for this population.
REFERENCES: 1. Bandholm T, Kehlet H. Physiotherapy exercise after fast-track total hip and knee arthroplasty: time for reconsideration? Arch Phys Med Rehabil. 2012 Jul;93(7):1292-4. Epub 2012 Feb 27.
2. Husby VS, Helgerud J, Bjorgen S, Husby OS, Benum P, Hoff J. Early maximal strength training is an efficient treatment for patients operated with total hip arthroplasty. Arch Phys Med Rehabil 2009 Oct;90(10):1658-67.
StatusUdgivet - 2014
Begivenhed14th EFORT Congress - Istanbul Congress Center, Istanbul, Tyrkiet
Varighed: 5 jun. 20138 jun. 2013


Konference14th EFORT Congress
LokationIstanbul Congress Center

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