Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Spine
Abstract number: 23272
RADIOGRAPHIC PREDICTORS OF DEGENERATIVE SPONDYLOLISTHESIS IN
A MEAN 12-YEAR PROSPECTIVE STUDY
Kiyoshi AONO, Tetsuya KOBAYASHI, Yuji ATSUTA, Takeo MATSUNO
Asahikawa Medical College, Asahikawa (JAPAN)
[INTRODUCTION] This study was designed to identify predictors of degenerative
spondylolisthesis (DS) in a prospective study of community-based women.
[METHODS] A final total of 142 community-based female volunteers, aged 40-75
years with no DS at baseline x-ray, were followed for 8-15 years. Standing entire
spine radiographs were used for measuring lumbar lordosis (LL), pelvic incidence
(PI), sagittal spinal balance, disc height ratio, vertebral inclination angle (VA), facet
sagittalization (FS), and the magnitude of spondylolisthesis with more than 5% slip
defined as newly-developed DS. [RESULTS] Subjects - baseline age was 54.7 years,
and during mean follow-up period of 12.1 years, 18 subjects (12.7%) developed DS.
Significant differences were demonstrated between DS and non-DS subjects in
baseline LL (DS 40.5 vs. non-DS 32.7 P=0.0151), PI (62.4 vs. 54.7, P=0.0056), VA
(L4 12.0 vs. 5.3, P=0.0135; L5 23.2 vs. 16.4, P=0.0167), and FS (33.3% vs. 4.8%,
P41, 2)
PI>63, 3) L4-VA>12, 4) L5-VA>24, and 5) positive FS, which showed significant
linear correlation with the incidence of DS. [DISCUSSION] The value of PI has been
suggested as a risk of DS, and introduced DS score, including baseline PI value,
predicted the development of DS among susceptible female subjects.
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