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Osteopenic features of the hip joint in patients with cerebral palsy: a hospital‐based study
Author(s) -
Moon Sang Young,
Kwon SoonSun,
Cho Byung Chae,
Chung Chin Youb,
Lee Kyoung Min,
Sung Ki Hyuk,
Chung Myoung Ki,
Zulkarnain Arif,
Kim Yong Sung,
Park Moon Seok
Publication year - 2016
Publication title -
developmental medicine and child neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.658
H-Index - 143
eISSN - 1469-8749
pISSN - 0012-1622
DOI - 10.1111/dmcn.13146
Subject(s) - acetabulum , cerebral palsy , medicine , femur , confidence interval , gross motor function classification system , hounsfield scale , bone density , nuclear medicine , osteoporosis , surgery , computed tomography , physical therapy
Aim We aimed to evaluate the bone mineral density of the hip joint in patients with cerebral palsy ( CP ). Method Patients with CP younger than 18 years who underwent three‐dimensional hip examination by computed tomography were analysed. Bone attenuation of the acetabulum and femur was measured as Hounsfield units ( HU ), and was adjusted for affecting factors such as hip instability and Gross Motor Function Classification System ( GMFCS ). Results One hundred and twenty‐six patients with CP and 86 typically developing participants were included. The average bone attenuation was significantly lower in those with CP than in the comparison group (acetabulum: 70.8 HU , 95% confidence interval [95% CI ] 59.9–81.8; femur: 82.2 HU , 95% CI 70.4–95.8). Compared with GMFCS levels I to III , bone attenuation was significantly lower for GMFCS levels IV (acetabulum: 30.9 HU , 95% CI 15.7–46.2; femur: 39.7 HU , 95% CI 19.9–59.5) and V (acetabulum: 51.7 HU , 95% CI 35.9–67.5; femur: 72.5 HU , 95% CI 51.9–93.0). The average bone attenuation decreased when the migration percentage was over 37% (acetabulum: 11.6 HU , 95% CI 1.4–24.6; femur: 26.8 HU , 95% CI 9.9–43.6). Interpretation Bone attenuation of the acetabulum and femur was significantly affected both by GMFCS level and by severity of hip instability.