Synovial membrane and joint fluid volumes after arthroscopic synovectomy. Values are medians (ranges in parentheses). NS indicates no significant difference
| All knees | RA knees | Non-RA knees | Mann-Whitney (RA v non-RA) | |
| Synovial membrane volumes (cm3) | ||||
| Month 0 | 62 (21–177) | 59 (46–128) | 66 (21–177) | NS |
| Month 2 | 49 (18–86) | 49 (19–86) | 50 (18–74) | NS |
| Month 12 | 44 (1–73) | 42 (9–73) | 45 (1–61) | NS |
| Wilcoxon-Pratt test (p value) | ||||
| Month 0 v 2 | <0.05 | NS (0.09) | <0.05 | |
| Month 0 v12 | <0.01 | <0.05 | NS (0.06) | |
| Month 2v 12 | NS (0.16) | NS (0.74) | NS (0.08) | |
| Joint fluid volumes (cm3) | ||||
| Month 0 | 45 (6–173) | 36 (15–94) | 70 (6–173) | NS |
| Month 2 | 18 (3–49) | 28 (6–40) | 11 (3–49) | NS |
| Month 12 | 17 (0–77) | 18 (5–77) | 15 (0–47) | NS |
| Wilcoxon-Pratt test (p value) | ||||
| Month 0 v2 | <0.01 | <0.05 | <0.05 | |
| Month 0v 12 | <0.05 | NS (0.31) | <0.05 | |
| Month 2 v 12 | NS (0.66) | NS (0.80) | NS (0.50) | |