All | AS | PsA | Und SpA | p-value | |||||
---|---|---|---|---|---|---|---|---|---|
N=621 | N=340 | N=222 | N=59 | ||||||
N | % | N | % | N | % | N | % | ||
Mean (SD) | |||||||||
Age, year | 49.3 (12.4) | 45.2 (12.5) | 56.7 (11.8) | 45.9 (12.9) | <0.0001 | ||||
Age at diagnostic, year | 40.1 (12.9) | 33.5 (12.6) | 46.8 (13.5) | 39.9 (12.5) | <0.0001 | ||||
Male | 328 | 52.8 | 208 | 61.1 | 96 | 43.2 | 24 | 40.6 | <0.0001 |
Age at onset, <45 years | 469 | 75.5 | 291 | 85.5 | 140 | 63.1 | 38 | 64.4 | <0.0001 |
Low back pain | 342 | 55.1 | 266 | 78.2 | 47 | 21.2 | 29 | 49.2 | <0.0001 |
Arthritis | 411 | 66.2 | 152 | 44.7 | 213 | 96 | 46 | 78 | <0.0001 |
Enthesitis | 217 | 34.9 | 136 | 40. | 37 | 16.7 | 44 | 74.6 | 0.38 |
Dactylitis | 116 | 18.7 | 49 | 14.4 | 45 | 20.3 | 22 | 37.3 | 0.0002 |
Psoriasis | 225 | 36.2 | 3 | 0.88 | 221 | 99.6 | 1 | 1.7 | <0.0001 |
Uveitis | 92 | 14.8 | 75 | 22.1 | 7 | 3.2 | 10 | 16.9 | <0.0001 |
Family history | 108 | 17.4 | 55 | 16.2 | 47 | 21.2 | 6 | 10.2 | 0.09 |
Sacroilitis (Rx) | 70/171 | 40.9 | 62/116 | 53.5 | 7/37 | 18.9 | 1/18 | 5.6 | <0.0001 |
Sacroilitis (MRI) | 203/279 | 72.8 | 182/212 | 85.9 | 21/39 | 53.9 | 0/28 | 0.0 | <0.0001 |
HLA-B27 | 284/438 | 64.8 | 229/321 | 71.3 | 17/61 | 27.9 | 38/56 | 67.9 | <0.0001 |
Axial | 397 | 63.9 | 328 | 96.5 | 37 | 16.8 | 32 | 54.2 | <0.0001 |
Peripheral | 488 | 78.6 | 213 | 62.6 | 218 | 98.2 | 57 | 96.6 | <0.0001 |
Both | 264 | 42.5 | 201 | 59.1 | 33 | 14.9 | 30 | 50.9 | <0.0001 |
SD, standard deviation; Rx, radiography; MRI, Magnetic resonance.