Document Detail

Correlation of pelvic incidence with low- and high-grade isthmic spondylolisthesis.
MedLine Citation:
PMID:  12634563     Owner:  NLM     Status:  MEDLINE    
PURPOSE: The development of isthmic spondylolisthesis is influenced by forces across the lumbosacral region of the spine. Pelvic incidence is a radiographic parameter that has been shown to be an independent parameter that influences both sagittal spinal balance and pelvic orientation. Our hypothesis then is that there is a positive correlation between pelvic incidence and spondylolisthesis. STUDY DESIGN: A radiographic analysis of cases with spondylolisthesis. OBJECTIVES: To try to assess the correlation between pelvic incidence in both low-grade and high-grade spondylolisthesis in both a pediatric and an adult population. SUMMARY OF BACKGROUND DATA: The concept of pelvic incidence has been introduced into the literature. Its exact association with spondylolisthesis has not yet been clarified. METHODS: Forty patients with spondylolisthesis were identified and divided into two groups: low-grade (Meyerding I-II) and high-grade (Meyerding III and higher). Radiographic parameters measured included lumbar sagittal alignment (T12-S1), sacral inclination, slip angle, and pelvic incidence. The spondylolisthesis was classified according to the Meyerding-Newman classifications and the slip angle. Radiographic measurements were also done in two control groups; there were 20 pediatric and 20 adult controls (mean age 11.8 years and 60.0 years, respectively). Unpaired t test analysis and Pearson correlation analysis were then done. RESULTS: Mean pelvic incidence was 47.4 degrees in the pediatric control group, 57 degrees in the adult control group, 68.5 degrees in the low-grade isthmic spondylolisthesis group, and 79.0 degrees in the high-grade isthmic spondylolisthesis group. Pelvic incidence was found to be significantly higher in the high- and low-grade spondylolisthesis groups compared with both control groups (P = 0.0001). Pelvic incidence was significantly higher in the high-grade isthmic spondylolisthesis group than in the low-grade isthmic spondylolisthesis group (P = 0.007). A significant correlation existed between pelvic incidence and Meyerding-Newman scores (P = 0.03). CONCLUSIONS: Pelvic incidence was significantly higher in patients with low- and high-grade isthmic spondylolisthesis as compared with controls and had significant correlation with the Meyerding-Newman grades (P = 0.03).
Darrell S Hanson; Keith H Bridwell; John M Rhee; Lawrence G Lenke
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  Spine     Volume:  27     ISSN:  1528-1159     ISO Abbreviation:  Spine     Publication Date:  2002 Sep 
Date Detail:
Created Date:  2003-03-13     Completed Date:  2003-03-26     Revised Date:  2009-07-09    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2026-9     Citation Subset:  IM    
Institute for Spinal Disorders, Houston, Texas, USA.
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MeSH Terms
Lordosis / complications,  radiography
Lumbar Vertebrae / radiography
Middle Aged
Pelvis / radiography*
Predictive Value of Tests
Severity of Illness Index
Spondylolisthesis / complications,  radiography*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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