Patienterne var mellem 18 og 70 år gamle og havde aktiv prosiasis artrit (≥ 3 svulne led og ≥ 3 ømme led) i mindst en af følgende former:
Patients were between 18 and 70 years of age and had active psoriatic arthritis ( 3 swollen joints and  3 tender joints) in at least one of the following forms: