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A modified standardized nine hole peg test for valid and reliable kinematic assessment of dexterity post-stroke
Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi.
Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi.ORCID-id: 0000-0002-0366-4609
2019 (engelsk)Inngår i: Journal of NeuroEngineering and Rehabilitation, ISSN 1743-0003, E-ISSN 1743-0003, Vol. 16, nr 1, artikkel-id 8Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

BACKGROUND: Impairments in dexterity after stroke are commonly assessed by the Nine Hole Peg Test (NHPT), where the only outcome variable is the time taken to complete the test. We aimed to kinematically quantify and to compare the motor performance of the NHPT in persons post-stroke and controls (discriminant validity), to compare kinematics to clinical assessments of upper extremity function (convergent validity), and to establish the within-session reliability.

METHODS: The NHPT was modified and standardized (S-NHPT) by 1) replacing the original peg container with an additional identical nine hole pegboard, 2) adding a specific order of which peg to pick, and 3) specifying to insert the peg taken from the original pegboard into the corresponding hole of the target pegboard. Eight optical cameras registered upper body kinematics of 30 persons post-stroke and 41 controls during the S-NHPT. Four sequential phases of the task were identified and analyzed for kinematic group differences. Clinical assessments were performed.

RESULTS: The stroke group performed the S-NHPT slower (total movement time; mean diff 9.8 s, SE diff 1.4), less smoothly (number of movement units; mean diff 0.4, SE diff 0.1) and less efficiently (path ratio; mean diff 0.05, SE diff 0.02), and used increased scapular/trunk movements (acromion displacement; mean diff 15.7 mm, SE diff 3.5) than controls (P < 0.000, r ≥ 0.32), indicating discriminant validity. The stroke group also spent a significantly longer time grasping and releasing pegs relative to the transfer phases of the task compared to controls. Within the stroke group, kinematics correlated with time to complete the S-NHPT and the Fugl-Meyer Assessment (rs 0.38-0.70), suggesting convergent validity. Within-session reliability for the S-NHPT was generally high to very high for both groups (ICCs 0.71-0.94).

CONCLUSIONS: The S-NHPT shows adequate discriminant validity, convergent validity and within-session reliability. Standardization of the test facilitates kinematic analysis of movement performance, which in turn enables identification of differences in movement control between persons post-stroke and controls that may otherwise not be captured through the traditional time-based NHPT. Future research should ascertain further psychometric properties, e.g. sensitivity, of the S-NHPT.

sted, utgiver, år, opplag, sider
BioMed Central, 2019. Vol. 16, nr 1, artikkel-id 8
Emneord [en]
Clinical laboratory techniques, Outcome assessment, Stroke, Upper extremity
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-155494DOI: 10.1186/s12984-019-0479-yISI: 000455641600001PubMedID: 30642350OAI: oai:DiVA.org:umu-155494DiVA, id: diva2:1280305
Forskningsfinansiär
Västerbotten County CouncilThe Swedish Brain FoundationTilgjengelig fra: 2019-01-18 Laget: 2019-01-18 Sist oppdatert: 2019-02-08bibliografisk kontrollert

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Johansson, Gudrun M.Häger, Charlotte K.

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