Table 2. Clinical features of the RA patients and HCs enrolled in the selection and validation sets.
| Characteristics | RA(active) | RA(non-active) | HCs |
|---|---|---|---|
| Number of participants | 44 | 31 | 70 |
| Gender, male/female | 6/38 | 5/26 | 6/64 |
| Age, mean (range) | 53.3(24 to 75) | 51.54(22 to 81) | 46.67(26 to 68) |
| RF titer (IU) | 332.7(8 to 1450 | 237.2(4 to 2560) | NA |
| ESR (mm), mean (range) | 49.24(2 to 319) | 28.48(4 to 250) | NA |
| CCP-Ab, mean (range) | 275.28(20 to 942.7) | 335.44(8 to 768) | NA |
| CRP (mg/dl), mean (range) | 13.6(1 to 55.3)) | 9.2(1 to 64.7) | NA |
| DAS28, mean (range) | 5.8(3.51 to 7.58) | 2.1(1.18 to 3.18) | NA |
| SJC, mean (range) | 7.8(2 to 20) | 0.038(0 to 1) | NA |
| TJC, mean (range) | 13.1(2 to 28) | 0.21(0 to 2) | NA |
RA, rheumatoid arthritis; HCs, healthy controls; CRP, C-reactive protein; DAS28, 28-joint Disease Activity Score; ESR, erythrocyte sedimentation ratio; NA, not applicable; SJC, swollen joint count; TJC, tender joint count.