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Characteristics by axial involvement on MRI
| Characteristic, n (%) | All subjects (n = 67) | Positive sacroiliitis on MRI | Negative sacroiliitis on MRI | P value |
|---|---|---|---|---|
| Gender, male | 43 (64.2) | 22 (55) | 21 (77.8) | 0.07 |
| HLA-B27 positivity (n = 57) | 29 (50.9) | 9 (30) | 20 (74.4) | 0.001 |
Gender distribution and HLA-B27 positivity by axial involvement upon presentation. MRI Magnetic resonance imaging, HLA Human leukocyte antigen
