Table 1.

Demographic and disease characteristics of patients with AxPsA at study entry. AxPsA-CR was defined by clinical AND/OR radiographic evidence of AxPsA, and AxPsA-R was defined by the presence of radiographic criteria alone (for details of criteria see text). Data are number (%) of patients or mean (standard deviation), unless specified.

CharacteristicsAxPsA-CRAxPsA-R
No. patients297244
Male/female169/128156/88
Age, yrs42.543.8
Duration of psoriasis, yrs1416
Duration of PsA, yrs89
Median (range) duration of followup, yrs10.9 (5.1–32.7)10.3 (5.0–28.4)
No. of actively inflamed (tender and/or swollen) joints10.5 (9.8)9.7 (10.0)
No. of swollen joints3.3 (4.3)3.4 (4.3)
No. of clinically damaged joints4.2 (9.1)5.1 (9.7)
No. of radiographically damaged joints5.7 (9.4)7.3 (9.9)
Axial symptoms166/297 (56)110/244 (45)
  Inflammatory neck pain122/297 (41)92/244 (38)
  Inflammatory back pain114/297 (38)66/244 (27)
Clinical sacroiliitis54/282 (19)27/227 (12)
Syndesmophytes (classical and/or paramarginal)
  Cervical29/284 (10)38/239 (16)
  Thoracic36/250 (14)52/223 (23)
  Lumbar28/250 (11)36/222 (16)
Radiographic sacroiliitis*
  Grade 263/285 (22)125/240 (52)
  Grade 347/285 (16)55/240 (23)
  Grade 413/285 (5)14/240 (6)
  • * When asymmetric, number indicates the higher grade of sacroiliitis.