Table 4 Association of knee pain stratified by knee synovial abnormalities on ultrasound and radiographic osteoarthritis status
Synovial abnormalities and ROA status | No. of patients with knee pain (%) | Crude OR (95% CI)a | Adjusted OR (95% CI)a | P value of interaction |
|---|---|---|---|---|
Synovial hypertrophy | 0.004 | |||
Neither synovial hypertrophy nor ROA | 1013 (20.6) | 1.00 (reference) | 1.00 (reference) | |
Synovial hypertrophy only | 86 (25.4) | 1.31 (1.00, 1.71) | 1.46 (1.10, 1.93) | |
ROA only | 772 (47.7) | 3.51 (3.04, 4.04) | 2.45 (2.10, 2.87) | |
Synovial hypertrophy and ROA | 313 (65.8) | 7.40 (5.86, 9.34) | 5.51 (4.27, 7.11) | |
Joint effusion | 0.067 | |||
Neither joint effusion nor ROA | 744 (19.7) | 1.00 (reference) | 1.00 (reference) | |
Joint effusion only | 355 (24.1) | 1.29 (1.10, 1.52) | 1.34 (1.13, 1.59) | |
ROA only | 560 (47.8) | 3.74 (3.17, 4.40) | 2.62 (2.18, 3.14) | |
Joint effusion and ROA | 525 (56.8) | 5.35 (4.47, 6.40) | 3.86 (3.18, 4.69) | |
Power Doppler signal | 0.794 | |||
Neither Power Doppler signal nor ROA | 1075 (20.7) | 1.00 (reference) | 1.00 (reference) | |
Power Doppler signal only | 24 (45.3) | 3.18 (1.81, 5.58) | 3.12 (1.70, 5.73) | |
ROA only | 971 (50.0) | 3.84 (3.35, 4.39) | 2.69 (2.31, 3.12) | |
Power Doppler signal and ROA | 114 (74.0) | 10.94 (7.34, 16.30) | 8.34 (5.44, 12.80) |