The assessment of the spondyloarthritis international society concept and criteria for the classification of axial spondyloarthritis and peripheral spondyloarthritis: A critical appraisal for the pediatric rheumatologist

Table 2 Variables associated with the likelihood of developing ankylosing spondylitis after a mean of 12.2 years (10 to14) ref. [[60]**]* and radiographic sacroiliitis after a mean of 14.9 years (11.7 to 25.1) ref. [**[61]]

*35 patients with juvenile-onset ankylosing spondylitis compared with 75 patients with systemic, polyarticular, and pauciarthritis type 1 juvenile rheumatoid arthritis. OR and 95%CI were recalculated and differ from those reported in the original publication ref. [60]. In this sample, no multivariate analysis was performed.
314 patients with juvenile idiopathic arthritis ref. [61].
In a 15-year extended follow-up of 55 patients with enthesitis related arthritis years, DRB1*04 (OR 4.13, 95%CI 1.26-13.46, p = 0.19; univariate analysis), hip arthritis at 6 months (OR 46.73, 95%CI 1.16-39.34; multivariate analysis), and high sedimentation rate for at least 6 month (OR 4.09, 95%CI 1.05-15.91; multivariate analysis) were associated with radiographic sacroiliitis ref. [63].
OR = odds ratio. 95%CI = 95% confidence intervals. AS = ankylosing spondylitis. ND = not determined. IBP = inflammatory back pain. SIJ = sacroiliac joint pain.

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