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Validity and Reliability of Arch Height Index Measurement in Children With Spastic Diplegic Cerebral Palsy
Levent Karataş1, Ayça Utkan Karasu, Murat Zinnuroğlu
1Department of Physical Medicine and Rehabilitation, Gazi University Faculty of Medicine, Ankara, Turkey.
Insights
The Arch Height Index (AHI) reliably measures the medial longitudinal arch (MLA) in children with spastic diplegic cerebral palsy (CP). Lower AHI scores correlate with reduced motor function and increased spasticity.
Area of Science:
- Pediatrics
- Orthopedics
- Biomechanical analysis
Background:
- Children with spastic diplegic cerebral palsy (CP) often exhibit foot deformities.
- Accurate assessment of the medial longitudinal arch (MLA) is crucial for understanding functional limitations in CP.
Purpose of the Study:
- To determine the validity and reliability of the Arch Height Index (AHI) for evaluating MLA structure in children with spastic diplegic CP.
Main Methods:
- Twenty children (5-18 years) with spastic diplegic CP underwent AHI measurements in sitting and standing positions.
- Arch flexibility index (AFI) was calculated.
- Reliability was assessed using intraclass correlation coefficients (ICC), and validity by correlating AHI with clinical parameters.
Main Results:
- AHI demonstrated high interobserver reliability.
- Significant correlations were found between AHI and calcaneal pitch, navicular index, and Meary's angle.
- Lower AHI was linked to decreased gross motor function, increased hip adductor spasticity, and limited ankle eversion range of motion.
Conclusions:
- The AHI is a valid and reliable tool for assessing MLA in pediatric spastic diplegic CP.
- Reduced arch height, as measured by AHI, is associated with greater functional impairments in this population.
Purpose:
To evaluate the validity and reliability of the Arch Height Index (AHI) in assessing the medial longitudinal arch (MLA) structure in children with spastic diplegic cerebral palsy (CP).
Methods:
Twenty children with spastic diplegic cerebral palsy (CP), aged 5-18 years, were assessed. AHI measurements were taken in sitting and standing positions. Arch flexibility index (AFI) was calculated. Reliability was analyzed using intraclass correlation coefficients (ICC), and validity was evaluated by correlating AHI with clinical parameters.
Results:
AHI measurements showed high interobserver reliability. AHI was significantly correlated with calcaneal pitch, navicular index, and Meary's angle. A lower AHI was associated with decreased gross motor function, greater hip adductor spasticity, and ankle eversion range of motion.
Conclusions:
The AHI is a valid and reliable tool for assessing MLA in children with spastic diplegic CP. Lower arch height is associated with greater functional impairments.
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