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- Title
Spinal-pelvic orientation: potential effect on the diagnosis of spondyloarthritis.
- Authors
Alegria, Guillermo Carvajal; Deloire, Lucile; Herbette, Marion; Garrigues, Florent; Gossec, Laure; Simon, Alexandre; Feydy, Antoine; Reijnierse, Monique; Heijde, Désirée van der; Loeuille, Damien; Claudepierre, Pascal; Marhadour, Thierry; Saraux, Alain
- Abstract
Objective To assess associations of spinal-pelvic orientation with clinical and imaging-study findings suggesting axial SpA (axSpA) in patients with recent-onset inflammatory back pain. Methods Spinal-pelvic orientation was assessed in DESIR cohort patients with recent-onset inflammatory back pain and suspected axSpA, by using lateral lumbar-spine radiographs to categorize sacral horizontal angle (<40° vs ⩾40°), lumbosacral angle (<15° vs ⩾15°) and lumbar lordosis (LL, <50° vs ⩾50°). Associations between these angle groups and variables collected at baseline and 2 years later were assessed using the χ2 test (or Fisher's exact) and the Mann–Whitney test. With Bonferroni's correction, P < 0.001 indicated significant differences. Results Of 362 patients, 358, 356 and 357 had available sacral horizontal angle, lumbosacral angle and LL values, respectively; means were 39.3°, 14.6° and 53.0°, respectively. The prevalence of sacroiliitis on both radiographs and MRI was higher in the LL < 50° group than in the LL ⩾50° group, but the difference was not statistically significant. Clinical presentation and confidence in a diagnosis of axSpA did not differ across angle groups. No significant differences were identified for degenerative changes according to sacral horizontal angle, lumbosacral angle or LL. Conclusion Spinal-pelvic balance was not statistically associated with the clinical or imaging-study findings suggesting axSpA in patients with recent-onset inflammatory back pain.
- Subjects
ANKYLOSING spondylitis; BACKACHE; FISHER exact test; LONGITUDINAL method; LUMBAR vertebrae; MAGNETIC resonance imaging; PELVIS; SACRUM; SPINE; STATISTICS; DATA analysis; STATISTICAL significance; DATA analysis software; DESCRIPTIVE statistics; LORDOSIS; MANN Whitney U Test
- Publication
Rheumatology, 2020, Vol 59, Issue 1, p84
- ISSN
1462-0324
- Publication type
Article
- DOI
10.1093/rheumatology/kez240