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Measuring Knee Joint Position Sense: Test-retest reliability of a new designed assessment method using 3D-motion analysis – A pilot study
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Physiotherapy.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [sv]

Syfte: Att utveckla en ny metod för att mäta knäts ledpositioneringssinne i ett 3D-rörelseanalyssytem och utvärdera metodens test-retest-reliabilitet. 

Metod: Nitton vuxna försökspersoner (17 kvinnor och 2 män, 18-28år) med varierande aktivitetsgrad rekryterades. Deltagarna utförde ett enbensknäböj med ögonbindel i ett 3D-rörelseanalyssystem. Deltagarna böjde i knät fram till att en ljudsignal hördes som indikerade att de nått till den önskade testvinkeln som var 40° respektive 65°. I replikeringsförsöket tryckte försökspersonerna på en knapp när de trodde att samma vinkel som positioneringsförsöket hade uppnåtts. Försökspersonerna utförde fem försök på vardera ben och vinkel och testades vid två tillfällen med minst en vecka emellan. Intraclasskorrelationen (ICC) med 95% konfidensintervall (CI 95%) räknades utifrån medelvärdet på absoluta felet (AE) i grader för varje försöksperson. Absolut reliabilitet illustrerades genom graden av överensstämmelse i ett Bland-Altman-diagram.

Resultat: Medelvärdet för AE vid 40° var 3.70°± 1.64° och test-retest-reliabiliteten var bra (ICC=0.62, CI 95%=0.38-0.78). Medelvärdet för AE vid 60° var 2.76°±154° och test-retestreliabiliteten var bra (ICC=0.72, CI 95%=0.52-0.85). Det fanns en signifikant skillnad mellan AE vid 40° jämfört med 60° (p=0.006). 

Slutsats: De nya utvecklade metoden för knäts ledpositioneringssinne visade på god test-retest-reliabilitet. Det rekommenderas att en större försöksgrupp utvärderas för att säkerställa metodens reliabilitet och identifiera minsta upptäckbara skillnaden. Vidare måste metodens validitet undersökas innan man kan implementera metoden full ut.

Abstract [en]

Aim: The purpose was to design an improved method for estimating knee joint position sense (JPS) in a 3D-motion analysis laboratory and examine its test-retest reliability.

Methods: Nineteen adults (17 women and two men, 18-28 years) with varying activity level were recruited. The participants were standing blindfolded and performed a one-legged squat with balance support in a 3D-motion analysis laboratory. The participants flexed the standing leg until a signal sounded at the target knee angles of either 40° or 65°. In the reproduction test a trigger button was pressed when the participants thought the desired angle was reached. The participants performed five trials of each angle and leg at two occasions with at least one week apart. Intraclass correlation coefficients (ICC) with 95% confidence interval (CI 95%) were calculated between the mean absolute error (AE) to demonstrate relative reliability. Absolute reliability was illustrated through the limits of agreement in a Bland-Altman plot.

Results: The mean AE at 40° was 3.70°± 1.64° and the test-retest reliability was good (ICC=0.62, CI 95%=0.38-0.78). The mean AE at 65° was 2.76°±154°and the test-retest reliability was good (ICC=0.72, CI 95%=0.52-0.85). There was a significant difference of the mean AE between 40° and 65° (p=0.006).

Conclusion: This pilot study indicates good test-retest reliability of the proposed JPS test. It would be recommended that a larger study population is tested to confirm the reliability and identify minimal detectable changes. The validity also needs to be further investigated before the method can be fully implemented.

Place, publisher, year, edition, pages
2016. , 19 p.
Keyword [en]
Knee proprioception, JPS, Kinaesthesia, Weight bearing
Keyword [sv]
knäpropriocetion, ledpositioneringssinne, kinestesi, ny metod
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-121892OAI: oai:DiVA.org:umu-121892DiVA: diva2:935067
Educational program
Master's Programme in Physiotherapy
Supervisors
Examiners
Available from: 2016-09-16 Created: 2016-06-10 Last updated: 2016-09-16Bibliographically approved

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