Table 3

Logistic regression analysis for factors associated with isolated axial PsA at first presentation of axial disease adjusted for sex and age at PsA diagnosis (N=495)

Sex (male)0.588(0.097, 3.570)0.564
Age at diagnosis of PsA in years1.061(0.990, 1.138)0.095
Sacroiliitis grade*1.332(0.811, 2.188)0.2572.021(0.698, 5.852)0.195
Enthesitis0.176(0.024, 1.312)0.0900.000(0.000, ∞)0.995
Elevated ESR0.689(0.312, 1.521)0.3573.298(0.599, 18.173)0.170
Nail lesion0.357(0.171, 0.745)0.0060.445(0.075, 2.633)0.372
HLA-B*272.013(0.848, 4.779)0.11325.000(3.033, 206.114)0.003
Uveitis2.195(0.854, 5.644)0.1030.859(0.040, 18.311)0.922
HAQ0.063(0.008, 0.502)0.0090.004(0.000, 0.284)0.010
SF-36 PCS1.080(1.014, 1.151)0.0170.919(0.817, 1.034)0.161
  • *The sacroiliac joint with the highest grade was used preferentially for analysis.

  • ESR, erythrocyte sedimentation rate; HAQ, Health Assessment Questionnaire; PsA, psoriatic arthritis; SF-36 PCS, Short Form Health Survey Physical Health.