Table 2.
Summarized data from prehension movement analysis and JOA score.
| Parameter | Control | Patient | |
|---|---|---|---|
| Preop | Postop | ||
| Number male/female | 30 12/18 | 23 15/8 | 15 12/3 |
| Age | 63.4 ± 17.2 | 65.0 ± 14.8 | 63.9 ± 15.8 |
| Reach-to-grasp movement | |||
| Reaction time [RT] (sec) | 0.53 ± 0.19 | 0.50 ± 0.24 | 0.46 ± 0.22 (0.52 ± 0.25) |
| Movement time [MT] (sec) | 1.01 ± 0.37 | 1.12 ± 0.43 | 0.94 ± 0.32 (1.15 ± 0.55) |
| Maximum grip aperture [MGA] (cm) | 9.71 ± 1.35 | 11.4 ± 2.46∗∗ | 11.7 ± 2.62 (11.5 ± 2.53) |
| Time of maximum grip aperture [ToMGA] (ms) | 0.67 ± 0.28 | 0.89 ± 0.35∗ | 0.78 ± 0.33 (0.91 ± 0.44) |
| Position of maximum grip aperture [PoMGA] (cm) | 4.58 ± 5.09 | 1.55 ± 0.96§§ | 1.27 ± 0.67 (1.43 ± 0.70) |
| Normalized movement distance [NMD] | 1.22 ± 0.18 | 1.11 ± 0.07∗∗ | 1.08 ± 0.05 (1.10 ± 0.08) |
| Grip force (N) | |||
| Sandpaper | 4.18 ± 3.56 | 3.88 ± 2.08 | 3.88 ± 2.08 |
| Suede | 4.68 ± 3.81 | 3.86 ± 1.68 | 3.73 ± 1.84 (4.24 ± 1.82) |
| Silk | 6.39 ± 4.27 | 4.79 ± 1.94 | 4.34 ± 2.84 (5.06 ± 2.14) |
| JOA score | |||
| Motor function of fingers | — | 1.91 ± 1.12 | 2.40 ± 1.12 (2.13 ± 1.25) |
| Sensory function of the upper extremity | — | 1.11 ± 0.50 | 1.37 ± 0.52 (1.10 ± 0.47) |
| Total (motor + sensory) | — | 3.02 ± 1.31 | 3.77 ± 1.28† (3.23 ± 1.55) |
Values are expressed as mean ± SD. JOA test was not performed for normal controls (−). Values in parentheses indicate preoperative values of 15 patients.∗Statistically significant difference from control (p < 0.05, Welch two sample t-test). ∗∗ Statistically significant difference from control (p < 0.01, Welch two sample t-test). §§Statistically significant difference from control (p < .01, Wilcoxon rank-sum test). †Statistically significant different from preoperation (p < .05, paired sample t-test).