Dataset Information

Validation of the Narrowing Beam Walking Test in Lower Limb Prosthesis Users.

ABSTRACT:

Objective

To evaluate the content, construct, and discriminant validity of the Narrowing Beam Walking Test (NBWT), a performance-based balance test for lower limb prosthesis users.

Design

Cross-sectional study.

Setting

Research laboratory and prosthetics clinic.

Participants

Unilateral transtibial and transfemoral prosthesis users (N=40).

Interventions

Not applicable.

Main outcome measures

Content validity was examined by quantifying the percentage of participants receiving maximum or minimum scores (ie, ceiling and floor effects). Convergent construct validity was examined using correlations between participants' NBWT scores and scores or times on existing clinical balance tests regularly administered to lower limb prosthesis users. Known-groups construct validity was examined by comparing NBWT scores between groups of participants with different fall histories, amputation levels, amputation etiologies, and functional levels. Discriminant validity was evaluated by analyzing the area under each test's receiver operating characteristic (ROC) curve.

Results

No minimum or maximum scores were recorded on the NBWT. NBWT scores demonstrated strong correlations (ρ=.70‒.85) with scores/times on performance-based balance tests (timed Up and Go test, Four Square Step Test, and Berg Balance Scale) and a moderate correlation (ρ=.49) with the self-report Activities-specific Balance Confidence scale. NBWT performance was significantly lower among participants with a history of falls (P=.003), transfemoral amputation (P=.011), and a lower mobility level (P<.001). The NBWT also had the largest area under the ROC curve (.81) and was the only test to exhibit an area that was statistically significantly >.50 (ie, chance).

Conclusions

The results provide strong evidence of content, construct, and discriminant validity for the NBWT as a performance-based test of balance ability. The evidence supports its use to assess balance impairments and fall risk in unilateral transtibial and transfemoral prosthesis users.

SUBMITTER: Sawers A

PROVIDER: S-EPMC6064384 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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Publications

Validation of the Narrowing Beam Walking Test in Lower Limb Prosthesis Users.

Sawers Andrew A Hafner Brian B

Archives of physical medicine and rehabilitation 20180411 8

<h4>Objective</h4>To evaluate the content, construct, and discriminant validity of the Narrowing Beam Walking Test (NBWT), a performance-based balance test for lower limb prosthesis users.<h4>Design</h4>Cross-sectional study.<h4>Setting</h4>Research laboratory and prosthetics clinic.<h4>Participants</h4>Unilateral transtibial and transfemoral prosthesis users (N=40).<h4>Interventions</h4>Not applicable.<h4>Main outcome measures</h4>Content validity was examined by quantifying the percentage of p ...[more]

PMID: 29653108

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Dataset Information

Validation of the Narrowing Beam Walking Test in Lower Limb Prosthesis Users.

Objective

Design

Setting

Participants

Interventions

Main outcome measures

Results

Conclusions

Publications

Validation of the Narrowing Beam Walking Test in Lower Limb Prosthesis Users.

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