title: Quantitative gait analysis of patients with bilateral hip osteoarthritis excluding the influence of walking speed.
abstract: BACKGROUND
  The purpose of this study was to investigate gait characteristics of patients with bilateral hip osteoarthritis (BHO) independent of walking speed.
  
  
  METHODS
  We measured gait parameters in 12 BHO patients during free walking activities and in 12 normal adults during both free walking and slow walking activities using a three-dimensional computerized gait analysis system.
  
  
  RESULTS
  Patients with BHO had a lower walking speed, step length, and cadence than normal subjects during free walking. When compared with normal subjects walking at a slow speed, the walking speed difference among BHO patients disappeared, although BHO patients retained a relatively high cadence. Kinematic and kinetic factor analysis of BHO patients at free speed compared to normal subjects walking at a slow speed showed a forward-tilted pelvic angle in the BHO patients that dropped to that of the ipsilateral side during the stance phase. The peak extension and abduction angle of the hip and the peak abduction moment of the hip were all low, whereas the peak generation power of the ankle was high in BHO patients.
  
  
  CONCLUSIONS
  Gait characteristics of patients with BHO, independent of walking speed, were as follows: (1) increased cadence and ankle generation power; (2) reduced step width, hip extension, and abduction angle as well as a lower hip abduction moment; (3) maintained forward tilting of the pelvis during gait cycle; and (4) appearance of a dropped pelvis during the stance phase.
authors.affiliation: Division of Physical Therapy and Rehabilitation Medicine, University of Fukui Hospital, 23 Matsuoka Shimoaizuki, Eiheiji, Fukui, 910-1193, Japan.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Kubota
authors.forename: Seiichiro
authors.initials: S
authors.lastname: Shimada
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kobayashi
authors.forename: Shinichi
authors.initials: S
authors.lastname: Sasaki
authors.forename: Ippei
authors.initials: I
authors.lastname: Kitade
authors.forename: Mayumi
authors.initials: M
authors.lastname: Matsumura
authors.forename: Kenta
authors.initials: K
authors.lastname: Kamei
authors.forename: Mayumi
authors.initials: M
authors.lastname: Kitano
authors.forename: Kenichi
authors.initials: K
authors.lastname: Takeno
authors.forename: Hisatoshi
authors.initials: H
authors.lastname: Baba
mesh_terms: D005260:Female; D005684:Gait / Q000502:physiology*; D006621:Hip Joint / Q000503:physiopathology*; D006801:Humans; D007698:Kinesis; D008875:Middle Aged; D009068:Movement; D015207:Osteoarthritis, Hip / Q000175:diagnosis / Q000503:physiopathology*; D012720:Severity of Illness Index; D016138:Walking