title: Hip-spine syndrome: the effect of total hip replacement surgery on low back pain in severe osteoarthritis of the hip.
abstract: METHODS
  Prospective clinical study on the effect of total hip replacement surgery (THR) on low back pain (LBP) in patients with severe hip osteoarthritis.
  
  
  OBJECTIVE
  To assess the affect of THR on LBP.
  
  
  BACKGROUND
  Hip osteoarthritis causes abnormal gait and spinal sagittal alignment and is associated with LBP.
  
  
  METHODS
  All consecutive adults scheduled for THR in our department due to severe hip osteoarthritis were assessed by an independent investigator before surgery and 3 months and 2 years post-THR. The Harris Hip Score and the Oswestry scores were used to evaluate hip- and spine-related symptoms, respectively, as were visual analogue scales (VAS) and sagittal spinal radiographs.
  
  
  RESULTS
  Twenty-five patients (10 males; age range, 32-84 years) were evaluated. Both spinal and hip pain and function were significantly better following THR. The mean preoperative LBP VAS score of 5.04 was 3.68 after THR (P = 0.006). The mean preoperative Oswestry score of 36.72 was 24.08 after THR (P = 0.0011). Clinical improvement was maintained and enhanced at the 2-year follow-up. The mean hip pain VAS score was 7.08 before THR and 2.52 after THR (P < 0.01). The mean Harris Hip Score was 45.74 before and 81.8 after surgery (P < 0.01). There were no changes in the radiographic measurements.
  
  
  CONCLUSIONS
  Both LBP and spinal function were improved following THR. This study demonstrates the clinical benefits of THR on back pain and is the first to clinically validate hip-spine syndrome as hypothesized by Offierski and MacNab in 1983.
authors.affiliation: Department of Orthopedic Surgery B, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel. pelegbg@gmail.com
authors.forename: Peleg
authors.initials: P
authors.lastname: Ben-Galim
authors.forename: Tal
authors.initials: T
authors.lastname: Ben-Galim
authors.forename: Nahshon
authors.initials: N
authors.lastname: Rand
authors.forename: Amir
authors.initials: A
authors.lastname: Haim
authors.forename: John
authors.initials: J
authors.lastname: Hipp
authors.forename: Shmuel
authors.initials: S
authors.lastname: Dekel
authors.forename: Yizhar
authors.initials: Y
authors.lastname: Floman
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005684:Gait; D006801:Humans; D017116:Low Back Pain / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000150:complications / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D010147:Pain Measurement; D004856:Postural Balance; D011446:Prospective Studies; D011859:Radiography; D020127:Recovery of Function; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D013577:Syndrome; D013997:Time Factors; D016896:Treatment Outcome; D016138:Walking