AXIS is an Intl prospective study of 409 psoriatic arthritis pts - found Axial involvement in 27.4% of pts. Axial PsA signif younger (45 vs 47.6 yrs) , male (56% vs 51.5%), more B27 positivity (22% vs 11%), inflammatory back pain (75% vs 43%), & ^CRP (53% vs 37%) https://t.co/XY5pf4BNNm