title: The natural course of osteoarthritis of the hip due to subluxation or acetabular dysplasia.
abstract: In 59 patients, 86 hips with subluxation or hip dysplasia were examined to determine the natural course of the condition and select suitable treatment. Thirty-three percent of the joints (13/39 hips) developed early osteoarthritis from pre-osteoarthritis within an average term of 9.2 years, while the remaining, sixty-six percent (31/47 hips) developed advanced-stage osteoarthritis from early osteoarthritis within an average term of 7.8 years. Patients were classified into advanced and non-advanced groups according to radiographic analysis of the advanced groups according to radiographic analysis of the advance of the disease and statistical analysis was performed. In pre-osteoarthritis, centre-edge angle, slope of the acetabular roof, acetabular head index, acetabular depth ratio and Japanese Orthopaedic Association (JOA) hip score were significant predictors, while in early osteoarthritis, a broken Shenton's line, cranial joint space and JOA score were significant. On the basis of multiple parameters, formulas for predicting development in patients with pre-osteoarthritis, those with early osteoarthritis, and all patients together were established, with an accuracy of 87%, 71%, and 68%, respectively.
authors.affiliation: Department of Orthopaedic Surgery, Nagoya University School of Medicine, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Hasegawa
authors.forename: H
authors.initials: H
authors.lastname: Iwata
authors.forename: M
authors.initials: M
authors.lastname: Mizuno
authors.forename: E
authors.initials: E
authors.lastname: Genda
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: T
authors.initials: T
authors.lastname: Miura
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging; D000203:Activities of Daily Living; D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006617:Hip Dislocation / Q000150:complications*; D006618:Hip Dislocation, Congenital / Q000150:complications*; D006621:Hip Joint / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*; D011859:Radiography; D016059:Range of Motion, Articular