Limitations of 6-minute walk test reference values for spinal muscular atrophy.

Abstract:

INTRODUCTION:The 6-minute walk test (6MWT) is a well-established clinical assessment of functional endurance, validated as a measure of walking ability in spinal muscular atrophy (SMA). The current availability of disease-modifying therapies for SMA indicates a growing need for normative reference data to compare SMA patients with healthy controls. METHODS:The literature was searched in two scientific databases. Studies were evaluated and selected based on adherence to American Thoracic Society guidelines for administering the 6MWT. Reference equations from the selected studies were applied to 6MWT data collected from SMA patients to calculate and compare % predicted values. RESULTS:Three pediatric and six adult studies were selected for comparison. The % predicted values using the pediatric and adult equations ranged from 47.7 ± 18.2% to 67.6 ± 26.2% and 43.0 ± 17.9% to 59.5 ± 26.2%, respectively, and were significantly different (P < 0.001). DISCUSSION:Results suggest significant variability between % predicted values derived from published reference equations in children and adults, despite adherence to 6MWT standardization.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Goodwin AM,Cornett KMD,McKay MJ,Burns J,Garber CE,De Vivo DC,Montes J

doi

10.1002/mus.26794

subject

Has Abstract

pub_date

2020-03-01 00:00:00

pages

375-382

issue

3

eissn

0148-639X

issn

1097-4598

journal_volume

61

pub_type

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