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Hemophilia joint health score reliability study.
P Hilliard1, S Funk, N Zourikian
1Department of Rehabilitation Service, the Division of Rheumatology, The Hospital for Sick Children, University of Toronto, Canada. pamela.hilliard@sickkids.ca
Summary
The Hemophilia Joint Health Score (HJHS) shows excellent reliability for assessing joint health in children with haemophilia. This validated tool offers sensitive measurement of joint status in pediatric patients.
Area of Science:
- Pediatric Rheumatology
- Hematology
- Clinical Assessment Tools
Background:
- Assessing joint health in children with haemophilia is crucial but current measures lack sensitivity and validation.
- Existing joint health scores do not account for normal developmental changes in children.
- The Hemophilia Joint Health Score (HJHS) was developed to address these limitations.
Purpose of the Study:
- To evaluate the inter-observer and test-retest reliability of the Hemophilia Joint Health Score (HJHS).
Main Methods:
- A fully factorial design was employed with four physiotherapists assessing eight boys with severe hemophilia A.
- Boys aged 4-12 years with variable joint damage were evaluated over two consecutive days.
- Eleven impairment items across six index joints (elbows, knees, ankles) were assessed using the HJHS, with concordance measured by intra-class correlation coefficient.
Main Results:
- The Hemophilia Joint Health Score (HJHS) demonstrated excellent reliability.
- Inter-observer reliability was high, with an intra-class correlation coefficient of 0.83.
- Test-retest reliability was also excellent, achieving an intra-class correlation coefficient of 0.89.
Conclusions:
- This study provides the initial psychometric evaluation of the Hemophilia Joint Health Score (HJHS).
- The HJHS is a promising new, reliable measure for assessing joint health in boys with haemophilia.
- Further studies will continue to assess the psychometric properties of the HJHS.