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In Brief Purpose: To determine whether children with type I osteogenesis imperfecta (OI) exhibit ankle plantar flexor weakness and whether this correlates with physical function. Methods: Twenty children and adolescents with type I OI and 20 age-matched controls (age 6-18 years) participated in a single evaluation session. Data included strength assessment, Gillette Functional Assessment Questionnaire, Pediatric Outcome Data Collection Instrument (PODCI), and Faces Pain Scale—Revised. Results: Ankle plantar flexor weakness was evident in the OI group compared with the control group. Heel-rise strength correlated with ankle isometric plantar flexion strength. Limitations in PODCI subscales—sports and physical function and pain/comfort—are present in the OI group. Conclusion: Ankle plantar flexor weakness is present in children and adolescents with type I OI and correlates with function. Gillette Functional Assessment Questionnaire, PODCI, and strength assessment are valuable evaluation tools for children and adolescents with type I OI and can aid therapists in goal setting. The relationship between ankle strength and functional abilities in children and teens with OI is reported by the authors. They suggest baseline strength measures and programs to maintain strength needed for functional performance.
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Caudill et al. (2010) studied this question.
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