Patienterne i denne undersøgelse fik en dosis Enbrel på 25 mg eller 50 mg, eller placebo 2 gange om ugen i 12 uger, og derefter fik alle patienter i åbent studie 25 mg Enbrel to gange om ugen i yderligere 24 uger.
Patients in this study received a dose of 25 mg or 50 mg Enbrel, or placebo twice a week for 12 weeks and then all patients received open-label 25 mg Enbrel twice weekly for an additional 24 weeks.