KUMJ | VOL. 14 | NO. 1 | ISSUE 53 | JAN-MAR, 2016
Reliability and Validity of the Nepali Wolf Motor Function Test following Cross-cultural Adaptation
Adhikari SP, Tretriluxana J, Chaiyawat P
Abstract: Background
The Wolf motor function test is a standardized, reliable and valid performance-based
measure, which evaluates upper-extremity function. Neither there is any evidence
of neurological measure in Nepali nor has this tool been cross-culturally adapted to
date.
Objective
To cross-culturally translate and evaluate reliability and validity of Nepali Wolf motor
function test.
Method
Two forward-translators translated the original version into Nepali. After synthesizing,
two back- translators translated it into English. The expert committee consolidated
and derived a final Nepali version. Two assessors pretested on three participants
to confirm that the original concept of the tool is preserved. The agreement and
correlation between back-translators were evaluated. The inter- and intra-rater
reliability and agreement of two physiotherapists on eight participants were
demonstrated through intra-class-correlation- coefficient and weighted-kappa for
time and functional ability respectively. Criterion validity was explored against Fugl-
Meyer assessment scale.
Result
A cross-culturally adapted Nepali Wolf motor function test was pretested and
ensured that the Nepali version was still retaining its equivalence (rho: 0.74 to 1.0
for time, 0.82 to 1.0 for functional ability). Good-to- excellent inter- and intra-rater
reliability {intra-class-correlation-coefficient(2,1) and (3,1): 0.80 to 1.0 and 0.81 to
1.0 respectively} were demonstrated. Excellent agreement (kappa 0.90, p<0.00) and
good correlation (rho 0.57 to 1.0) between back-translators were found. An adequate
criterion validity (rho -0.95 for time, 0.91 for functional ability) against Fugl-Meyer
assessment scale has been demonstrated.
Conclusion
A cross-culturally adapted Nepali Wolf motor function test, preserving its original
concept, was developed, and the reliability and validity of the tool on individuals
with stroke has been demonstrated.
Keyword : Reliability, stroke, translation, validity, wolf motor function test
