Table 2.
Operative information and postoperative results of patients treated with replantation classified by Chung’s classification
| Zone 1A | Zone 1B | |||||||
|---|---|---|---|---|---|---|---|---|
| Trained group | Control group | P value | Ratio difference (95% CI) | Trained group | Control group | P value | Ratio difference (95%CI) | |
| Digits, no. | 88 | 69 | 65 | 54 | ||||
| Repair vein, no. of digits, number (%) | 0.319 | 0.002a | ||||||
| None | 79 (89.8) | 65 (94.2) | - | (−13.2%, 5.0%) | 1 (1.5) | 2 (3.7) | - | (−11.1%, 5.0%) |
| One | 9 (10.2) | 4 (5.8) | - | (−5.0%, 13.2%) | 13 (20) | 21 (38.9) | - | (−34.4%, −2.5%) |
| Two and more | 0 (0) | 0 (0) | - | - | 51 (78.5) | 31 (57.4) | - | (4.3%, 36.7%) |
| Repair nerve, no. of digits, number (%) | 0.076 | 0.002a | ||||||
| None | 77 (78.5) | 66 (95.7) | - | (−17.1%, 1.2%) | 2 (3.1) | 2 (3.7) | - | (−9.7%, 7.3%) |
| One | 11 (12.5) | 3 (4.3) | - | (−1.2%, 17.1%) | 4 (6.2) | 16 (29.6) | - | (−37.2%, −9.9%) |
| Two | 0 (0) | 0 (0) | - | 59 (90.8) | 36 (66.7) | - | (13.1%, 41.0%) | |
| Time of replanting each finger, mean (SD), min | 94.2 (6.5) | 126.5 (11.9) | <0.01a | (−35.4, −29.1)b | 124.1 (6.9) | 147.0 (12.3) | <0.01a | (−26.6, −19.1)b |
| Survival rate (%) (no. of digits) | 81.8 (72) | 66.7 (46) | 0.029a | (1.5%, 28.7%) | 87.7 (57) | 72.2 (39) | 0.033a | (1.1%, 29.9%) |
| Complication, no. of digits, rate (%) | ||||||||
| Arterial insufficiency | 9 (10.2) | 16 (23.2) | 0.028a | (−25.1%, 1.3%) | 7 (10.8) | 11 (20.4) | 0.146 | (−23.3%, 3.5%) |
| Venous congestion | 20 (22.7) | 15 (21.7) | 0.883 | (−12.4%, 13.7%) | 8 (12.3) | 16 (29.6) | 0.019a | (−31.8%, 2.7%) |
| Cold intolerance | 21 (23.9) | 22 (31.9) | 0.263 | (−22.0%, 5.9%) | 12 (18.5) | 14 (25.9) | 0.327 | (−22.5%, 7.3%) |
| Pulp atrophy | 22 (25.0) | 22 (31.9) | 0.340 | (−21.0%, 7.1%) | 10 (15.4) | 19 (35.2) | 0.012a | (−34.7%, 4.2%) |
| Pain | 3 (3.4) | 1 (1.4) | 0.792 | (−4.7%, 8.2%) | 1 (1.5) | 6 (11.1) | 0.069 | (−20.7%, 0.7%) |
| Neuroma | 2 (2.3) | 1 (1.4) | 1.000 | (−5.7%, 6.6%) | 1 (1.5) | 3 (5.6) | 0.484 | (−13.7%, 3.6%) |
| Functional outcome | ||||||||
| Monofilament test, no. of digits, number (%) | ||||||||
| Remain protective sensation | 58 (65.9) | 37 (53.6) | 0.162 | (−3.0%, 27.0%) | 54 (83.1) | 35 (64.8) | 0.038a | (2.5%, 33.4%) |
| Static two-point discrimination (mm) | ||||||||
| Mean (SD) | 7.98 (2.48) | 8.47 (2.68) | 0.340 | - | 6.64 (2.12) | 9.19 (3.49) | 0.030a | - |
| Median, [IQR] | 8[6–9] | 8.5[6–10] | - | - | 6[5–8] | 8.5[7–11] | - | - |
| Active flexion of DIPJ | ||||||||
| Mean (SD) | 62.3° (3.43) | 60.7° (4.86) | 0.083 | - | 57.4° (4.99) | 58.4° (6.16) | 0.484 | - |
| Median, [IQR] | 62, [61–64] | 57, [53–58] | - | - | 62, [53–60] | 57, [54–61] | - | - |
a
Statistically significant at P < 0.05.
b
Mean difference (95% CI). Continuous variables were assessed using the Wilcoxon–Mann–Whitney test and the Welch t-test, and categorical variables were evaluated by the χ2 test.