AI Article Synopsis

  • Traditional outcome measures in DMD trials exclude young boys due to reliance on cooperation, but alternative assessments like the Bayley III, HFMSE, and NSAA show promise.
  • A study assessed 24 infants and boys with DMD, revealing significantly low scores in motor, cognitive, and language development compared to typical children, indicating developmental delays.
  • Results suggest that outcome assessments for young boys with DMD are feasible, with the Bayley III emerging as the most effective measure in this multicenter study.

Article Abstract

Therapeutic trials in Duchenne Muscular Dystrophy (DMD) exclude young boys because traditional outcome measures rely on cooperation. The Bayley III Scales of Infant and Toddler Development (Bayley III) have been validated in developing children and those with developmental disorders but have not been studied in DMD. Expanded Hammersmith Functional Motor Scale (HFMSE) and North Star Ambulatory Assessment (NSAA) may also be useful in this young DMD population. Clinical evaluators from the MDA-DMD Clinical Research Network were trained in these assessment tools. Infants and boys with DMD (n = 24; 1.9 ± 0.7 years) were assessed. The mean Bayley III motor composite score was low (82.8 ± 8; p ≤ .0001) (normal = 100 ± 15). Mean gross motor and fine motor function scaled scores were low (both p ≤ .0001). The mean cognitive comprehensive (p=.0002), receptive language (p ≤ .0001), and expressive language (p = .0001) were also low compared to normal children. Age was negatively associated with Bayley III gross motor (r = -0.44; p = .02) but not with fine motor, cognitive, or language scores. HFMSE (n=23) showed a mean score of 31 ± 13. NSAA (n = 18 boys; 2.2 ± 0.4 years) showed a mean score of 12 ± 5. Outcome assessments of young boys with DMD are feasible and in this multicenter study were best demonstrated using the Bayley III.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3743677PMC
http://dx.doi.org/10.1016/j.nmd.2013.04.005DOI Listing

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