Demographic data of matching criteria of control and ABA groups.
| Characteristics | Control, n = 97 | ABA, n = 97 | p |
|---|---|---|---|
| Female | 85 (87.6) | 83 (85.6) | 0.48 |
| Disease activity | 0.056 | ||
| Remission | 1 (1.0) | 1 (1.0) | |
| Low | 24 (24.7) | 22 (22.7) | |
| Moderate | 58 (59.8) | 55 (56.7) | |
| High | 14 (14.4) | 19 (19.6) | |
| Oral steroid use | 67/96 (69.8) | 71/96 (74.0) | 0.42 |
| Operation site and method | 0.33 | ||
| Spine | |||
| Spinal surgery | 1 (1.0) | 2 (2.1) | |
| Hip and knee | |||
| Arthroplasty with implant | 43 (44.3) | 37 (38.1) | |
| Synovectomy | 3 (3.1) | 2 (2.1) | |
| Others | 0 (0) | 2 (2.1) | |
| Foot and ankle | |||
| Arthroplasty with implant | 4 (4.1) | 4 (4.1) | |
| Arthrodesis | 1 (1.0) | 0 (0) | |
| Arthroplasty without implant | 4 (4.1) | 5 (5.2) | |
| Synovectomy | 0 (0) | 1 (1.0) | |
| Soft tissue procedure | 0 (0) | 1 (1.0) | |
| Others | 6 (6.2) | 3 (3.1) | |
| Shoulder and elbow | |||
| Arthroplasty with implant | 5 (5.2) | 7 (7.2) | |
| Arthroplasty without implant | 0 (0) | 2 (2.1) | |
| Synovectomy | 0 (0) | 4 (4.1) | |
| Others | 3 (3.1) | 0 (0) | |
| Wrist and fingers | |||
| Arthroplasty with implant | 5 (5.2) | 7 (7.2) | |
| Arthrodesis | 5 (5.2) | 8 (8.2) | |
| Arthroplasty without implant | 10 (10.3) | 3 (3.1) | |
| Synovectomy | 2 (2.1) | 3 (3.1) | |
| Soft tissue procedure | 3 (3.1) | 2 (2.1) | |
| Others | 2 (2.1) | 2 (2.1) |
Data are expressed as n (%) and are compared with Mantel-Haenszel test. ABA: abatacept.