title: Associations of radiographic degeneration and pain with daily cumulative hip loading in patients with secondary hip osteoarthritis.
abstract: The purpose of this study was to investigate the associations of radiographic and clinical variables of hip osteoarthritis (OA) with alterations in gait and joint loading in patients with secondary hip OA. Fifty females with secondary hip OA were participated. The minimum joint space width (mJSW) of the hip as a degenerative sign and Sharp and center edge (CE) angles as morphological variables were measured radiographically. Hip joint pain was assessed using a visual analog scale. As gait variables, walking speed, range of hip motion, hip moment peak, and hip moment impulse were calculated. Daily cumulative hip loading was calculated as the hip moment impulse multiplied by the mean number of steps per day. After bivariate correlation analyses between dependent (mJSW and pain) and independent variables (age, body mass index, sharp/CE angles, steps per day, and gait variables), separate forward-backward stepwise multiple regression analyses were performed for each dependent variable. Daily cumulative hip loading in the sagittal plane (β = 0.30, p = 0.021) and age (β = -0.36, p = 0.007) were significantly associated with the mJSW. Walking speed (β = -0.36, p = 0.008) and age (β = 0.29, p = 0.031) were significantly associated with hip joint pain. Decrease in daily cumulative hip loading in the sagittal plane was associated with mJSW independently of age. Although the causal relationship was not clear, patients with hip OA reduced total exposure to hip joint loading adaptively rather than lowering the hip moment peak concerning worsening of hip degeneration. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 34:1977-1983, 2016.
authors.affiliation: Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
authors.forename: Hiroshige
authors.initials: H
authors.lastname: Tateuchi
authors.affiliation: Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Koyama
authors.affiliation: Department of Rehabilitation Science, Hyogo University of Health Sciences, Kobe, Japan.
authors.forename: Rui
authors.initials: R
authors.lastname: Tsukagoshi
authors.affiliation: Department of Orthopaedic Surgery, School of Medicine, Gifu University, Gifu, Japan.
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Akiyama
authors.affiliation: Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Goto
authors.affiliation: Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
authors.forename: Kazutaka
authors.initials: K
authors.lastname: So
authors.affiliation: Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Kuroda
authors.affiliation: Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
authors.forename: Noriaki
authors.initials: N
authors.lastname: Ichihashi
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D005684:Gait; D006617:Hip Dislocation / Q000150:complications; D006801:Humans; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000000981:diagnostic imaging* / Q000209:etiology / Q000503:physiopathology*; D010147:Pain Measurement; D011859:Radiography; D016474:Weight-Bearing; D055815:Young Adult
keywords: cumulative loading; gait; hip osteoarthritis; joint space width; pain