Table 6

Logistic regression analysis for factors associated with isolated axial PsA at first presentation of axial disease adjusted for sex and age at psa/as diagnosis among the isolated axial PsA and isolated axial AS with psoriasis cohorts (N=114)

VariableUnivariate modelMultivariate model
OR95% CIP valueOR95% CIP value
Sex (male)0.638(0.131 to 3.106)0.578
Age at diagnosis of PsA or AS in years1.063(1.002 to 1.129)0.043
Nail lesion17.295(4.923 to 60.760)<0.00112.370(2.215 to 69.073)0.004
Inflammatory back pain0.170(0.054 to 0.537)0.0030.116(0.074 to 1.320)0.011
HLA-B*270.200(0.074 to 0.540)0.0010.312(0.074 to 1.320)0.113
Biologics0.125(0.043 to 0.368)<0.0010.319(0.074 to 1.380)0.126
  • AS, ankylosing spondylitis; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; HAQ, Health Assessment Questionnaire; PsA, psoriatic arthritis.