title: The relationship between spinopelvic parameters and clinical symptoms of severe isthmic spondylolisthesis: a prospective study of 64 patients.
abstract: OBJECTIVE
  To investigate the relationship between spinopelvic parameters and clinical symptoms for patients with severe isthmic spondylolisthesis.
  
  
  METHODS
  A series of spinopelvic parameters were measured in 64 patients with L5 severe isthmic spondylolisthesis. The patients were divided into two groups according to Oswestry score obtained preoperatively, i.e. mild or severe low back pain group. T test was used to compare parameters between two groups, and multiple linear regression analysis was employed to investigate the association between parameters and Oswestry score.
  
  
  RESULTS
  Compared with two group patients, parameters of spondylolisthesis grade, pelvic tilt (PT), lumbar lordosis (LL), T9 tilting angle (T9TA), sacro-femoral horizontal distance (SFHD), distance between perpendicular line through C7 and sacrum (SC7D), pelvic tilt/sacral slope (PT/SS), sacro-femoral horizontal distance/vertical distance (SFHD/SFVD), and lumbar lordosis/thoracic kyphosis (LL/TK) were significantly increased in severe low back pain group, while SS and SFVD were significantly decreased, and no significant difference was found for pelvic incidence (PI) and TK. The statistical analysis showed that spondylolisthesis grade, PT, SC7D, LL, SFHD, PT/SS, SFHD/SFVD, and LL/TK had a significant positive correlation with Oswestry score, with an order of spondylolisthesis grade > PT/SS > SC7D > PT > SFHD/SFVD > SFHD > LL/TK > LL. No significant correlation was found for PI, TK, T9TA with Oswestry score, while SS and SFVD had a significant negative correlation with Oswestry score, with an order of SS > SFVD.
  
  
  CONCLUSIONS
  The spinopelvic parameters (spondylolisthesis grade, SS, PT, SC7D, LL, SFVD, SFHD, PT/SS, SFHD/SFVD, LL/TK) are significantly correlated with clinical symptoms of severe isthmic spondylolisthesis in patients. The association of the exacerbation of low back pain with SS (correlation coefficient -0.981, strong) and SFVD (correlation coefficient -0.802, strong) is the most significant correlation.
authors.affiliation: Department of Spine Surgery, The Second Xiangya Hospital of Central South University, No. 139 Renmin Middle Road, Changsha, 410011, China.
authors.forename: Zhengguang
authors.initials: Z
authors.lastname: Wang
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.forename: Bangliang
authors.initials: B
authors.lastname: Yin
authors.forename: Weidong
authors.initials: W
authors.lastname: Liu
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
authors.forename: Guohua
authors.initials: G
authors.lastname: Lv
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D015994:Incidence; D007738:Kyphosis / Q000473:pathology*; D008141:Lordosis / Q000473:pathology*; D017116:Low Back Pain / Q000209:etiology*; D008159:Lumbar Vertebrae / Q000473:pathology; D008297:Male; D008875:Middle Aged; D010388:Pelvis; D011446:Prospective Studies; D012447:Sacrum; D012720:Severity of Illness Index; D013168:Spondylolisthesis / Q000503:physiopathology* / Q000601:surgery; D013904:Thoracic Vertebrae / Q000473:pathology; D055815:Young Adult