Construct validity of the 2-minute walk test for patients with lower limb amputation using prosthesis
DOI:
https://doi.org/10.1590/1809-2950/21009428042021Keywords:
Amputation, International Classification of Functioning, Disability and Health, Gait, Prostheses and ImplantsAbstract
Allied to functional assessment, walking
tests have been reported to be reliable and valid
for several populations, quantifying an individual’s
functional capacity and responding to changes during
the rehabilitation process. This study aims to analyze the
construct validity of the 2-minute walk test for patients
with prosthetic lower limbs undergoing rehabilitation.
A total of 51 patients aged over 18 years underwent
the 2-minute walk test. These individuals had a clinical
diagnosis of lower limb amputation at any level and
had undergone rehabilitation at least six months at
the time of assessment, which was correlated with the
Functional Measure for Amputees (FMA) questionnaires
and the Medical Outcomes Study 36-Item Short-Form
Health Survey (SF-36) aspects to obtain the Pearson
Correlation Coefficient with a significance level of p<0.05.
Among the participants, 64.7% were male, with a mean
age of 53.4 years, 59.92% had transtibial amputation and
the main cause was trauma (54.90%). The average sco re for the questionnaires was 63.58 points for the Physical Capacity
of the SF-36 and 37.14 points for question two of the FMA.
The correlation of the distance walked in the 2-minute walk
test showed a moderate correlation for the Physical Capacity
of the SF-36 and a moderate correlation for question two
of the FMA. The outcomes show a moderate correlation between
the 2-minute walk test and the subjective function assessment
tools used, showing that it is valid as an objective measure for
the population studied.
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