PLoS ONE (Jan 2016)

Timed Rise from Floor as a Predictor of Disease Progression in Duchenne Muscular Dystrophy: An Observational Study.

  • Elena S Mazzone,
  • Giorgia Coratti,
  • Maria Pia Sormani,
  • Sonia Messina,
  • Marika Pane,
  • Adele D'Amico,
  • Giulia Colia,
  • Lavinia Fanelli,
  • Angela Berardinelli,
  • Alice Gardani,
  • Valentina Lanzillotta,
  • Paola D'Ambrosio,
  • Roberta Petillo,
  • Filippo Cavallaro,
  • Silvia Frosini,
  • Luca Bello,
  • Serena Bonfiglio,
  • Roberto De Sanctis,
  • Enrica Rolle,
  • Nicola Forcina,
  • Francesca Magri,
  • Gianluca Vita,
  • Concetta Palermo,
  • Maria Alice Donati,
  • Elena Procopio,
  • Maria Teresa Arnoldi,
  • Giovanni Baranello,
  • Tiziana Mongini,
  • Antonella Pini,
  • Roberta Battini,
  • Elena Pegoraro,
  • Yvan Torrente,
  • Stefano C Previtali,
  • Claudio Bruno,
  • Luisa Politano,
  • Giacomo P Comi,
  • Maria Grazia D'Angelo,
  • Enrico Bertini,
  • Eugenio Mercuri

DOI
https://doi.org/10.1371/journal.pone.0151445
Journal volume & issue
Vol. 11, no. 3
p. e0151445

Abstract

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The role of timed items, and more specifically, of the time to rise from the floor, has been reported as an early prognostic factor for disease progression and loss of ambulation. The aim of our study was to investigate the possible effect of the time to rise from the floor test on the changes observed on the 6MWT over 12 months in a cohort of ambulant Duchenne boys.A total of 487 12-month data points were collected from 215 ambulant Duchenne boys. The age ranged between 5.0 and 20.0 years (mean 8.48 ±2.48 DS).The results of the time to rise from the floor at baseline ranged from 1.2 to 29.4 seconds in the boys who could perform the test. 49 patients were unable to perform the test at baseline and 87 at 12 month The 6MWT values ranged from 82 to 567 meters at baseline. 3 patients lost the ability to perform the 6mwt at 12 months. The correlation between time to rise from the floor and 6MWT at baseline was high (r = 0.6, p<0.01).Both time to rise from the floor and baseline 6MWT were relevant for predicting 6MWT changes in the group above the age of 7 years, with no interaction between the two measures, as the impact of time to rise from the floor on 6MWT change was similar in the patients below and above 350 m. Our results suggest that, time to rise from the floor can be considered an additional important prognostic factor of 12 month changes on the 6MWT and, more generally, of disease progression.