Joint hypermobility syndrome subclassification in paediatrics: a factor analytic approach

Area of Science:

• Pediatric rheumatology
• Clinical genetics
• Biostatistics

Background:

• Joint hypermobility syndrome (JHS) is a complex condition affecting children.
• Understanding distinct clinical patterns within JHS is crucial for effective management.
• Previous classifications may not fully capture the heterogeneity of JHS presentations.

Purpose of the Study:

• To investigate the utility of exploratory factor analysis in identifying clinically recognizable subtypes of JHS in children.
• To define these subtypes based on presenting signs and symptoms.
• To explore associations between identified subtypes and clinical outcomes.

Main Methods:

• Eighty-nine children aged 6-16 years diagnosed with JHS were assessed.
• A comprehensive evaluation included anthropometric, musculoskeletal, and functional tests.
• Exploratory factor analysis was employed to identify underlying patterns in signs and symptoms.

Main Results:

• Five JHS subtypes accounted for 66% of the variance in the data.
• Subtypes included 'joint affected', 'athletic', 'systemic', 'soft tissue affected', and 'high BMI' JHS.
• Specific subtypes were significantly associated with pain, fatigue, and health-related quality of life.

Conclusions:

• Exploratory factor analysis successfully identified five clinically recognizable subtypes of JHS in children.
• These subtypes provide a framework for understanding the diverse presentations of JHS.
• Further research can explore targeted interventions based on these identified subtypes.