The prognosis for walking in osteogenesis imperfecta

Area of Science:

• Pediatric Orthopedics
• Developmental Pediatrics
• Genetics

Background:

• Osteogenesis imperfecta (OI) is a genetic disorder characterized by brittle bones.
• Understanding factors influencing mobility in children with OI is crucial for clinical management.
• Existing classifications (Sillence, Shapiro) aim to categorize OI severity.

Purpose of the Study:

• To investigate the relationship between developmental milestones and walking ability in children with osteogenesis imperfecta.
• To assess the predictive value of Sillence and Shapiro classifications for walking potential.
• To compare mobility development in patients treated with intramedullary rodding versus those not treated.

Main Methods:

• A postal survey was conducted among 59 families of children diagnosed with osteogenesis imperfecta.
• Data on developmental milestones, specifically independent sitting by ten months, and walking ability were collected from 51 respondents.
• Collected data were analyzed in relation to the Sillence and Shapiro classifications and intramedullary rodding treatment.

Main Results:

• Both Sillence and Shapiro classifications demonstrated utility in predicting eventual walking ability.
• Achieving independent sitting by ten months predicted walking as the primary mobility in 76% of patients.
• Only 18% of patients who did not achieve sitting by ten months achieved walking as their main mobility; treatment modality did not alter this developmental pattern.

Conclusions:

• Independent sitting by ten months is a significant predictor of walking as the main mode of mobility in children with osteogenesis imperfecta.
• The developmental trajectory of mobility appears consistent between treated (intramedullary rodding) and untreated patients.
• Clinical classifications of OI can aid in forecasting ambulatory outcomes.