Table 4.
Physical examination measures
| Physical examination measure | All first operated thumbs | Unilateral trapeziectomy and intact contralateral CMC1 joint | |||
| Operated hand (n = 80)a | Operated hand (n = 39) | Unoperated hand (n = 39) | Mean difference (95% CI) | p valueb | |
| Strength in kg | |||||
| Grip | 17.0 ± 7.1 | 16.7 ± 7.3 | 16.6 ± 6.9 | 0.1 (-1.6 to 1.8) | 0.90 |
| Key pinch | 4.4 ± 1.5 | 4.4 ± 1.4 | 5.0 ± 1.5 | -0.6 (-0.9 to -0.3) | 0.001 |
| ROM in ° | |||||
| Thumb | |||||
| IP extensionc | 11 ± 11 | 12 ± 10 | 13 ± 16 | 1.4 (-2.9 to 5.7) | 0.51 |
| IP flexion | 64 ± 12 | 62 ± 12 | 62 ± 11 | 0.6 (-3.0 to 4.3) | 0.73 |
| MCP extensionc | 15 ± 14 | 14 ± 16 | 10 ± 19 | -4.0 (-9.2 to 1.3) | 0.13 |
| MCP flexion | 39 ± 13 | 39 ± 12 | 42 ± 14 | -3.5 (-8.0 to 1.1) | 0.13 |
| Palmar abduction | 39 ± 10 | 38 ± 11 | 38 ± 10 | 0 (-2.5 to 2.5) | > 0.99 |
| Radial abduction | 42 ± 7 | 41 ± 8 | 41 ± 7 | -0.9 (-3.0 to 1.1) | 0.36 |
| Opposition deficit (mm)d | 0 (0, 10) | 0 (0, 10) | 0 (0, 5) | 0 (0, 0) | 0.27 |
| Wrist | |||||
| Flexion | 61 ± 12 | 61 ± 13 | 59 ± 13 | 2.1 (-1.9 to 6.1) | 0.29 |
| Extension | 61 ± 11 | 62 ± 11 | 58 ± 9 | 3.6 (0.5 to 6.8) | 0.03 |
| Radial deviation | 22 ± 12 | 24 ± 13 | 22 ± 7 | 2.5 (-2.2 to 7.1) | 0.28 |
| Ulnar deviation | 40 ± 9 | 39 ± 9 | 41 ± 9 | -1.7 (-3.8 to 0.4) | 0.12 |
Data presented as mean ± SD, unless otherwise specified.
a
Data from 80 patients who attended clinical and radiographic examination (Fig. 1).
b
Paired t-test.
c
Values represent hyperextension; MCP fusion in three hands (two in unilateral group), and MCP extension deficit (> 10°) was present in one hand.
d
Values are median (quartiles) distance to base of small finger; median difference (quartiles); CMC1 = thumb carpometacarpal; IP = interphalangeal; MCP = metacarpophalangeal.