title: Clinical, radiological, and laboratory findings in Lebanese spondylarthropathy patients according to HLA-B27 status.
abstract: To evaluate clinical, radiologic, and laboratory features in Lebanese spondylarthropathy patients according to HLA-B27 status.
  
  
  METHODS
  We retrospectively compared demographic, clinical, radiologic, and severity data in 40 HLA-B27-positive and 58 HLA-B27-negative patients. All 98 patients met Amor's or European Spondylarthropathy Study Group criteria for spondylarthropathy, and 51.7% met New York modified criteria for ankylosing spondylitis.
  
  
  RESULTS
  Onset before 16 years of age, hip involvement, and an elevated mean erythrocyte sedimentation rate were significantly associated with the presence of the HLA-B27 (32.5 vs 13.8%, P=0.02; 45 vs 7.5%, P=0.001; and 47.7 vs 25.4, P=0.02; respectively). The two groups were comparable for age, sex ratio, prevalence and distribution of spondylarthropathy types, family history, sacroiliitis, bamboo spine, syndesmophytes, peripheral joint involvement, enthesopathies, extra-articular involvement, response to nonsteroidal anti-inflammatory drugs, and need for other medications.
  
  
  CONCLUSIONS
  In Lebanon, spondylarthropathy patients positive for HLA-B27 experience disease onset at an earlier age, are more likely to develop hip involvement, and have laboratory evidence of more severe inflammation than their HLA-B27-negative counterparts. None of the other clinical and radiologic parameters are modified by HLA-B27 status.
authors.affiliation: Rheumathology department, Hôtel-Dieu de France, Beirut, Lebanon.
authors.forename: H
authors.initials: H
authors.lastname: Awada
authors.forename: G
authors.initials: G
authors.lastname: Abi-Karam
authors.forename: R
authors.initials: R
authors.lastname: Baddoura
authors.forename: J
authors.initials: J
authors.lastname: Okais
authors.forename: S
authors.initials: S
authors.lastname: Attoui
mesh_terms: D000328:Adult; D003710:Demography; D004185:Disability Evaluation; D018450:Disease Progression; D005260:Female; D015796:HLA-B27 Antigen / Q000032:analysis / Q000097:blood* / Q000276:immunology; D006801:Humans; D007861:Lebanon; D008297:Male; D012189:Retrospective Studies; D013166:Spondylitis / Q000175:diagnosis* / Q000276:immunology* / Q000503:physiopathology
chemical_list: D015796:HLA-B27 Antigen