12 лефлуномид са 52, 3% (изследване MN301/ 303), 50, 5% (изследване MN302) и 49, 4% (изследване US301), сравнени с тези при пациентите на сулфасалазин – 53, 8% (изследване MN301/ 303), и тези на метотрексат 64, 8% (изследване MN302) и 43, 9% (изследване US301).
26.3% (study US301). After 12 months with active treatment, the ACR response rates in leflunomide patients were 52.3% (studies MN301/ 303), 50.5% (study MN302) and 49.4% (study US301), compared to 53.8% (studies MN301/ 303) in sulphasalazine patients, 64.8% (study MN302), and 43.9% (study US301) in methotrexate patients.