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Reliabilitetstest av kraftmätare ISOP - ISOmetric Power device
Swedish School of Sport and Health Sciences, GIH, Department of Sport and Health Sciences.
2014 (Swedish)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesisAlternative title
Reliability testing of ISOP -ISOmetric Power device (English)
Abstract [sv]

Sammanfattning

Syfte och frågeställningar

Syftet med studien var att i ett test-retest utvärdera tillförlitligheten i den nyutvecklade kraftmätaren ISOP vad gäller isometrisk muskelkraft i handledens tre rörelseplan. Den frågeställning som låg till grund för studien var följande:

Föreligger det någon signifikant skillnad i uppmätta värden vid upprepade mätningar av handledskraft vid två separata testtillfällen (s.k. “test-retest”)?

Metod

Ett test-retest utfördes på 20 stycken testpersoner (tio kvinnor/tio män, ålder 28-48 år, medelvärde 38,6 år), utan tidigare hand- eller handledsskada. Åtta mätningar utfördes i sex olika handledsriktningar: flexion, extension, radialdeviation, ulnardeviation, pronation och supination av dominant hand samt flexion och extension av icke-dominant hand. Varje mätning bestod av tre stycken tryck med maximal kraft i följd, samt i varje rörelseriktning, och resultatet beräknades som ett medelvärde av dessa (test 1). Testprotokollet upprepades identiskt efter en vecka (test 2). Som intern kontroll användes Jamar handdynamometer, vilken är sedan tidigare reliabilitetstestad.

Resultat

Sambandet mellan test 1 och test 2 analyserades med Pearson’s korrelations koefficient (r) samt Intraclass Correlation Coefficient (ICC) med ett p-värde satt till 0,001. Resultatet av Pearson r visade ett mycket starkt samband för 9 av 10 par med värden mellan 0,84-0,98, och ett starkt samband för det tionde paret med ett värde på 0,77. Sambandet stärks ytterligare av att ICC ligger mellan 0,88-0,99 för samtliga par. Ett beroende student’s t-test utfördes för att påvisa eventuella skillnader mellan testerna men inga signifikanta skillnader hittades och detta stärker sambandet mellan testerna. Signifikanta skillnader om p är mindre än 0,05.

Slutsats

Den nyutvecklade kraftmätaren ISOP uppvisar god reliabilitet med mycket starka – starka samband vad gäller test-retest. Inga signifikanta skillnader mellan mätningarna kunde påvisas. ISOP kan således anses vara tillförlitligt för bruk vid rehabilitering och utvärdering av handledsfunktion.

Abstract [en]

Abstract

Aim and hypothesis

The aim of this study was to evaluate the reliability of ISOP – a new isometric power device with regard to evaluating isometric muscle force in the three planes of wrist motion. The hypothesis was as follows:

Is there a significant difference in isometric power when repeated measurements are conducted at two different time-intervals (so called ”test-retest”)?

Method

A test-retest protocol was performed in 20 volunteers (ten women/ten men, age range 28-48 years, average 38.6), with no prior hand or wrist injury. Eight measurements were done in six different directions of the wrist: flexion, extension, radial deviation, ulnar deviation, pronation and supination of the dominant hand, as well as flexion and extension of the non-dominant hand. Each measurement consisted of three sequential maneuvers using maximum force, and the results were calculated as an average of these (test 1). The exact same protocol was repeated after a week (test 2). As an internal control, the Jamar hand dynamometer was used as it has previously been proven reliable.

Results

The relationship between test 1 and test 2 were analyzed using Pearson’s correlation coefficient (r) and Intraclass Correlation Coefficient (ICC) with a p-value set at 0.001. The result of Pearson’s r showed a very strong correlation between 9 of 10 pairs tested, with values between 0.84-0.98, and a strong correlation for the tenth pair with a value of 0.77. The strength of the correlations were confirmed by the ICC which showed 0.88-0.99 for all pairs. A dependent t-test was additionally performed to test for possible deviations between the tests, but no significant differences were found (p>0.05) which strengthens the relationship between the tests.

Conclusion

The new isometric power device, ISOP, has a very strong to strong correlation in a test-retest situation. No significant differences between the measurements could be demonstrated. ISOP may thus be considered a reliable device for use in wrist rehabilitation and evaluation.

Place, publisher, year, edition, pages
2014.
Series
Examensarbete, 2014:65
Keyword [sv]
Handled, kraft, utvärderingsinstrument, test-retest
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:gih:diva-3368OAI: oai:DiVA.org:gih-3368DiVA: diva2:734152
Educational program
Magisterprogrammet i idrottsvetenskap med inriktning mot idrottsmedicin
Presentation
2014-05-28, 10:08 (Swedish)
Supervisors
Examiners
Available from: 2014-08-05 Created: 2014-07-15 Last updated: 2014-08-05Bibliographically approved

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