Title: Ambulatory capacity and disease progression as measured by the 6-minute-walk-distance in Duchenne muscular dystrophy subjects on daily corticosteroids
Authors: Goemans, Nathalie ×
Van den Hauwe, Marleen
Wilson, Rosamund
Van Impe, Annelies
Klingels, Katrijn
Buyse, Gunnar #
Issue Date: Aug-2013
Publisher: Pergamon Press
Series Title: Neuromuscular Disorders vol:23 issue:8 pages:618-23
Article number: 10.1016/j.nmd.2013.05.006
Abstract: In order to understand contemporary natural history of Duchenne muscular dystrophy (DMD), we report 6-minute walk distance (6MWD) and its change over time from a large single centre population of corticosteroid treated DMD boys. Sixty-five boys on daily corticosteroid treatment were identified with a mean (SD) age of 9.5 (2.3) years at first observation. 6MWD was described for 1year age groupings. In addition, changes in 6MWD at 1, 1.5 and 2years (±12weeks) of follow-up were evaluated. The same evaluations were applied to 6MWD data converted to percent predicted values based on the Geiger equation. 6MWD showed an increase from age group 4.5-5.5years to age group 6.5-7.5years, followed by a decline, which became precipitous from 12.5years onwards. From 15.5years, all boys were unable to perform the 6-min test. Changes in 6MWD demonstrated a mean (median, SD) decline of -43 (-14, 90) m at 1year (N=25, mean baseline age 9.5years), -64 (-56, 99) m at 1.5years (N=18, mean baseline age 9.6years), -125 (-106, 139) m at 2years (N=14, mean baseline age 10.0years). Conversion to percent predicted values showed the same pattern of evolution.This study provides data on the ambulatory capacity and its changes over time in a homogenous cohort of 65 DMD boys on daily corticosteroids. The variability, the age-related aspects and the slope of decline of the 6MWD should be considered in the design and interpretation of therapeutic trials in ambulant DMD patients.
ISSN: 0960-8966
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Research Group for Neuromotor Rehabilitation
× corresponding author
# (joint) last author

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