Table 1.
Finger joint space width reduction estimated by computer-aided joint space analysis for metacarpal-phalangeal articulation
| Z-Score | ||||||
|---|---|---|---|---|---|---|
| Average Sharp Score for joint space narrowing | MCP (thumb) | MCP (index finger) | MCP (middle finger) | MCP (ring finger) | MCP (little finger) | MCP (total) |
| 0 | 0.27 ± 0.62 | 0.46 ± 0.62 | 0.32 ± 0.61 | 0.21 ± 0.55 | 0.15 ± 0.58 | 0.24 ± 0.33 |
| 1 | -0.31 ± 0.70 | -0.37 ± 0.83 | -0.11 ± 0.58 | -0.05 ± 0.66 | -0.11 ± 0.60 | -0.16 ± 0.29 |
| 2 | -0.39 ± 0.82 | -0.70 ± 0.96 | -0.39 ± 0.91 | -0.11 ± 0.82 | -0.33 ± 0.78 | -0.39 ± 0.44 |
| 3 | -1.46 ± 1.54 | -1.91 ± 1.57 | -1.45 ± 1.69 | -1.18 ± 1.30 | -1.41 ± 1.59 | -1.41 ± 1.01 |
| Difference between score 0 and 3 | 1.74 ± 0.42 | 2.37 ± 0.43 | 1.77 ± 0.46 | 1.39 ± 0.36 | 1.56 ± 0.43 | 1.65 ± 0.30 |
| Significance, P | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 |
Data presented as mean ± standard deviation. Reduction of finger joint space widths from score 0 to 3 using the average Sharp-van der Heijde score as estimated by computer-aided joint space analysis for the metacarpal-phalangeal (MCP) articulation.