Validation of the Expanded Hammersmith Functional Motor Scale in spinal muscular atrophy type II and III.

Abstract:

:The relationships between the Expanded Hammersmith Functional Motor Scale (HFMSE) and genotype and motor and respiratory outcomes were examined in patients with spinal muscular atrophy types II and III (n = 70). The correlation between the HFMSE and Gross Motor Function Measure was r = 0.98. Correlations between HFMSE and forced vital capacity (percentage of predicted normal) (n = 56) and a functional rating (n = 57) were r = 0.87 and r = 0.92, respectively. Correlations with strength were as follows: knee extension, r = 0.74 (n = 60); elbow flexion, r = 0.77 (n = 61); and knee flexion, r = 0.74 (n = 58). The HFMSE differentiated patients by SMN2 copy number (P = .0007); bi-level positive airway pressure use, <8 versus ≥8 hours/day (P < .0001); ambulatory status (P < .0001); and spinal muscular atrophy type (P < .0001). The HFMSE demonstrates significant associations with established measures of function, strength, and genotype, and discriminates patients based on function, diagnostic category, and bi-level positive airway pressure need. Time of administration averaged 12 minutes. The HFMSE is a valid, time-efficient outcome measure for clinical trials in spinal muscular atrophy types II and III.

journal_name

J Child Neurol

authors

Glanzman AM,O'Hagen JM,McDermott MP,Martens WB,Flickinger J,Riley S,Quigley J,Montes J,Dunaway S,Deng L,Chung WK,Tawil R,Darras BT,De Vivo DC,Kaufmann P,Finkel RS,Pediatric Neuromuscular Clinical Research Network for Spin

doi

10.1177/0883073811420294

subject

Has Abstract

pub_date

2011-12-01 00:00:00

pages

1499-507

issue

12

eissn

0883-0738

issn

1708-8283

pii

0883073811420294

journal_volume

26

pub_type

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