American College of Rheumatology Pediatric response (ACR-Pedi) in 43 patients with juvenile idiopathic arthritis treated with leflunomide.
| Categories | n | ACR-Pedi < 30 | ACR-Pedi30 | ACR-Pedi50 | ACR-Pedi70 |
|---|---|---|---|---|---|
| Systemic | 6 | 1 | 1 | 3 | 1 |
| Polyarticular RF+ | 10 | 2 | 6 | 1 | 1 |
| Polyarticular RF− | 15 | 6 | 7 | 1 | 1 |
| Oligoarticular persistent | 3 | 2 | 0 | 1 | 0 |
| Oligoarticular extended | 7 | 3 | 2 | 1 | 1 |
| Enthesitis-related | 2 | 1 | 0 | 1 | 0 |
| Total | 43 | 15 | 16 | 8 | 4 |
RF: rheumatoid factor.