Investigation of multidirectional hip range of motion and hip motion asymmetry in individuals with idiopathic scoliosis with different curve patterns

Background: While some studies of the asymmetry of lower limbs in individuals with idiopathic scoliosis exist, there is a need for multidirectional studies conducted on hip joint range of motion and its relationship to curve patterns in idiopathic scoliosis. Objectives: This study analyzes the hip joint range of multidirectional motions, hip motion asymmetry and investigates them according to curve patterns in individuals with idiopathic scoliosis. Methods: The sample included 108 females with idiopathic scoliosis. Participants were divided into three groups: double curves, single thoracic curve and single lumbar curve. The range of hip flexion and extension, abduction and adduction, and internal and external rotations were assessed actively and passively with a universal goniometer. The range of motion, left-right asymmetry and the mid-points of the ranges of motion were analyzed. Results: The passive range of the right hip abduction was higher in the thoracic curve group vs. the lumbar curve group. Active and passive ranges of hip extension were higher in the left hip vs. right hip. Active left-right asymmetry was higher than passive left-right asymmetry. Conclusion: Individuals with idiopathic scoliosis had different hip abduction motions according to curve pattern that originated from single curves. Left-right hip asymmetry was seen for the hip extension motion. Higher left-right asymmetry for active motion than passive motion in hip abduction may indicate a problem in motion perception in individuals with idiopathic scoliosis. (C) 2021 Elsevier Ltd. All rights reserved.