# Hip Adduction Asymmetry in Girls with Adolescent Idiopathic Scoliosis

## TL;DR

Girls with adolescent idiopathic scoliosis show hip adduction asymmetry, with the right hip showing less movement and a link to spinal curvature.

## Contribution

This study identifies a significant hip adduction asymmetry in AIS patients and links it to spinal deformity severity.

## Key findings

- Left hip adduction angle was significantly higher than the right hip in AIS girls.
- Lumbar curvature was strongly correlated with right hip adduction angle.
- Thoracic curvature also showed a significant relationship with hip abduction differences.

## Abstract

Background: The aim of the study was to assess the difference in hip adduction in extended joint position in girls with adolescent idiopathic scoliosis (AIS). Methods: The study group consisted of 69 girls aged 9 to 14 years. The observational cross-sectional study involved interview, the clinical examination (body weight measurement, measuring the body height in an upright position, assessment of the alignment of the spinous processes of the thoracic and lumbar vertebrae, assessment of the location of selected anatomical landmarks of the torso), physical examination in which the shape of the ridge surface was analyzed with the use of the photogrammetric method and the moiré effect projection and tests (test of adduction of both hips). Results: Significant differences were noted in the values of abduction for the left and right hip. In the studied group, the mean adduction angle for the left hip was 26.3° and only 19.2° for the right hip. The difference was statistically significant (p < 0.001). Similarly, significant relationships were noted by the authors with reference to values of the difference in abduction for both hips and the sizes of thoracic (p = 00012) and lumbar curvature (p < 0.0001). A significant relationship was also noted between the values of lumbar curvature and the size of adduction for the right hip (p < 0.0001). Conclusions: Abductive contracture of the right hip was noted in the examined girls with AIS. The degree of scoliotic deformity of the lumbar spine is related to the size of the abductive contracture of the right hip joint.