Characteristics of the patients and their knees. Results are shown as mean (SD), (median), and range
| Group (n, F/M1-150) | Age (years) | Disease duration (years) | Aspirated SF1-150 volume (ml) |
| RA | |||
| All | 57.6 (12.1) | 13.0 (9.3) | 17.0 (13.5) |
| (97, 74/23) | (58) | (11) | (14.0) |
| 22–82 | 0.25–36 | 2–65 | |
| Early stage | 46.0 (15.4) | 5.0 (3.9) | 19.4 (12.4) |
| (17, 14/3) | (51) | (4.5) | (17.0) |
| 22–68 | 0.25–13 | 3–45 | |
| Middle stage | 59.0 (10.2) | 13.1 (8.7) | 18.6 (15.1) |
| (57, 41/16) | (59) | (12) | (18.0) |
| 36–79 | 0.5–36 | 2–65 | |
| Advanced stage | 62.2 (9.0) | 21.5 (10.0) | 11.7 (7.5) |
| (23, 19/4) | (62) | (21.5) | (10.0) |
| 44–82 | 3.5–42 | 2–30 | |
| OA | |||
| All | 64.0 (10.3) | 7.4 (6.8) | 14.7 (8.2) |
| (103, 83/20) | (64) | (5) | (14.0) |
| 44–86 | 0.25–30 | 3–45 | |
↵1-150 F = female; M = male; SF = synovial fluid.