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. 2007 Oct;17(9-10):693-7.
doi: 10.1016/j.nmd.2007.05.009. Epub 2007 Jul 19.

An expanded version of the Hammersmith Functional Motor Scale for SMA II and III patients

Jessica M O'Hagen  1 , Allan M Glanzman, Michael P McDermott, Patricia A Ryan, Jean Flickinger, Janet Quigley, Susan Riley, Erica Sanborn, Carrie Irvine, William B Martens, Christine Annis, Rabi Tawil, Maryam Oskoui, Basil T Darras, Richard S Finkel, Darryl C De Vivo
Affiliations

An expanded version of the Hammersmith Functional Motor Scale for SMA II and III patients

Jessica M O'Hagen et al. Neuromuscul Disord. 2007 Oct.

Abstract

Purpose: To develop and evaluate an expanded version of the Hammersmith Functional Motor Scale allowing for evaluation of ambulatory SMA patients.

Procedures: Thirty-eight patients with SMA type II or III were evaluated using the Gross Motor Function Measure and the Hammersmith Functional Motor Scale. Based on statistical and clinical criteria, we selected 13 Gross Motor Function Measure items to develop an expanded HFMS. The expanded Hammersmith Functional Motor Scale was validated by comparison with the Gross Motor Function Measure minus the 13 items (GMFM-75) and an assessment of clinical function. The reliability of the expanded Hammersmith Functional Motor Scale in 36 patients was established.

Findings: The expanded Hammersmith Functional Motor Scale was highly correlated with the GMFM-75 and the clinical function assessment (p=0.97, and p=0.90). The expanded Hammersmith Functional Motor Scale showed excellent test-retest reliability (International Coordinating Committee = 0.99).

Conclusions: The expanded Hammersmith Functional Motor Scale allows assessment of high functioning SMA type II and III patients. Ease of administration and correlation with established motor function measures justify use in future SMA clinical trials.

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Comment in

  • Outcome measure for SMA II and III patients.
    Bérard C, Fermanian J, Payan C. Bérard C, et al. Neuromuscul Disord. 2008 Jul;18(7):593-4; author reply 594-5. doi: 10.1016/j.nmd.2008.05.005. Epub 2008 Jul 1. Neuromuscul Disord. 2008. PMID: 18595697 No abstract available.

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