Abstract
Objectives
To provide (1) normative reference values for the 2-minute walk test (2MWT), (2) reference
equations for the 2MWT, and (3) information on the reliability and responsiveness
of the 2MWT across the adult lifespan.
Design
Cross-sectional study.
Setting
General community settings.
Participants
A population-based sample of adult participants (N=1137) contributed data to this
study, which was part of the National Institutes of Health (NIH) Toolbox for the Assessment
of Neurological and Behavioral Function Norming Project.
Interventions
Not applicable.
Main Outcome Measure
2MWT.
Results
Overall, the distance participants walked ranged from 64.6 to 300.8m (mean, 180.9m).
Men walked farther than did women (189.4m vs 176.0m; t=6.8; df=1,135; P<.001). Significant correlations were observed between the 2MWT and age (r=−.41), height (r=.29), weight (r=−.16), and body mass index (r=−.32). Age and body mass index were used in the linear regression modeling to predict
the 2MWT distance (R2=.55–.56). Test-retest reliability of the 2MWT as characterized by the intraclass
correlation coefficient was .82 (95% confidence interval, .76–.87). Based on a standard
error of measurement of 15.3m, the minimum detectable change for the 2MWT was 42.5m.
Conclusions
The study presents norms of the 2MWT established by the NIH Toolbox. The norms can
be used to determine the presence of limitations in walking endurance across the lifespan.
Keywords
List of abbreviations:
2MWT (2-minute walk test), 6MWT (6-minute walk test), BMI (body mass index), CI (confidence interval), ICC (intraclass correlation coefficient), MDC95 (minimum detectable change), NIH (National Institutes of Health)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: October 25, 2014
Footnotes
Funded in whole or in part with federal funds from the Blueprint for Neuroscience Research and the Office of Behavioral and Social Science Research, National Institutes of Health (grant no. HHS-N-260-2006-00007-C), with additional support from the National Children's Study (grant no. HHS-N-267-2007-00027-C).
Disclosures: none.
Identification
Copyright
© 2015 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.
