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Concurrent validity of the NK hand dexterity test
1Clinical Research Laboratory, Hand and Upper Limb Centre, St Joseph's Health Centre, PO Box 5777, London, Ontario N6A 4L6, Canada. jmacderm@julian.uwo.ca
Summary
The NK hand dexterity test (NKHDT) shows strong validity for measuring hand function. It correlates well with the Jebson's Hand Function Test (JHFT) and patient-rated function, differentiating between healthy and impaired upper extremities.
Area of Science:
- Occupational therapy
- Rehabilitation medicine
- Hand surgery
Background:
- Hand dexterity is crucial for daily activities.
- Objective measures are needed to assess hand function.
- The NK hand dexterity test (NKHDT) is a potential tool for evaluating hand dexterity.
Purpose of the Study:
- To evaluate the concurrent validity of the NKHDT.
- To compare NKHDT with the Jebson's Hand Function Test (JHFT).
- To assess NKHDT's correlation with patient-rated function and its ability to differentiate between individuals with and without upper extremity pathology.
Main Methods:
- Concurrent validity was assessed using three analyses.
- Correlation between NKHDT and JHFT.
- Correlation between dexterity tests and patient-rated function questionnaire.
- Comparison of subscale differentiation between subjects with and without upper extremity pathology.
Main Results:
- NKHDT demonstrated moderate to strong correlations with JHFT subtests (Pearson's r = 0.47–0.87).
- Both NKHDT and JHFT showed similar correlations with patient-rated function (Pearson's r = 0.34–0.67).
- All NKHDT subscales significantly differentiated between subjects with and without upper extremity pathology (p < 0.01).
Conclusions:
- The NKHDT is a valid measure of hand dexterity.
- Findings support the use of NKHDT in clinical and research settings.
- NKHDT can reliably assess hand function in individuals with upper extremity conditions.