Univariate Logistic Regression Analysis | Multivariate Logistic Regression Analysis | |||||
---|---|---|---|---|---|---|
Synovitis | ERA | Non-RA | OR (95% CI) (R2) | p (c stat) | OR (95% CI) (R2) | p (c stat) |
MR Carpal | 3 (4)* | 0 (0.5)* | 3.320 (1.555, 7.087) (0.40) | 0.002 (0.890) | 3.641 (1.119, 11.841) (0.487; 0.596) | 0.032 (0.979) |
US Carpal | 2 (2)* | 0 (1*) | 2.288 (1.159, 4.517) (0.21) | 0.017 (0.757) | ||
MR MCP 2–5 | 2 (3)* | 0 (0)* | 3.136 (1.353, 7.268) (0.29) | 0.008 (0.817) | ||
US MCP 2–5 | 0 (3)* | 0 (0)* | 1.648 (1.026, 2.647) (0.15) | 0.039 (0.702) | ||
MR PIP 2–5 | 3 (3)* | 1 (3.5)* | 1.650 (1.108, 2.455) (0.16) | 0.014 (0.714) | ||
US PIP 2–5 | 1 (3)* | 2 (3)* | 1.192 (0.861, 1.651) (0.03) | 0.289 (0.567) | ||
MR Extensor | 1 (2)* | 0 (0)* | 6.330 (1.602, 25.012) (0.30) | 0.008 (0.813) | ||
US Extensor | 0 (2) | 0 (0) | 2.764 (0.953, 8.017) (0.18) | 0.061 (0.706) | ||
MR Flexor | 4 (3)* | 0 (0)* | 4.373 (1.802, 10.609) (0.49) | 0.001 (0.926) | 5.099 (1.620, 16.051) (0.487; 0.596) | 0.005 (0.979) |
US Flexor | 1 (3)* | 0 (0)* | 1.984 (1.102, 3.571) (0.19) | 0.022 (0.731) | ||
Total MR | 13 (11)* | 3.0 (4.5)* | 1.996 (1.237, 3.221) (0.54) | 0.005 (0.959) | 2.769 (1.249, 6.139) (0.544) | 0.012 (0.959) |
Total US | 7 (9)* | 2.0 (5.0)* | 1.356 (1.108, 1.659) (0.33) | 0.003 (0.853) | 0.727 (0.445, 1.186) (0.544) | 0.201 (0.959) |
Mann-Whitney U test used for paired comparisons.
↵* p < 0.05. P values given in bold type are significant. R2: Cox & Snell R square; carpal: carpal synovitis, including radioulnar, radiocarpal, and intercarpal-carpometacarpal joints; ERA: early rheumatoid arthritis; extensor: 6 extensor tendon groups on the dorsal side of the wrist; flexor: 6 flexor tendon groups on the ventral side of the wrist and hand; GS: greyscale ultrasound; PD: power Doppler ultrasound; MCP 2–5: second through fifth metacarpophalangeal joints; MR: magnetic resonance; PIP 2–5: second through fifth interphalangeal joints; RA: rheumatoid athritis.