Table 2 Radiographic comparison between the LIPUS and control groups
Classification | LIPUS group (N = 30) | Control group (N = 30) | P-value†|
|---|---|---|---|
Initial tibial length (mm)* | 318 (262 to 353) | 313 (258 to 360) | 0.383 |
Amount of lengthening (mm)* | 82 (70 to 105) | 76 (50 to 100) | 0.065 |
Lengthening percentage (%)* | 25.8 (20.3 to 36.6) | 24.7 (13.9 to 35.5) | 0.350 |
External fixator index (days/cm)* | 29.4 (16.5 to 44.8) | 29.6 (17.3 to 45.8) | 0.579 |
Healing index (days/cm)* | |||
 Anterior cortex | 36.6 (21.7 to 51.6) | 57.5 (32.5 to 64.8) | <  0.001 |
 Posterior cortex | 24.3 (15.3 to 43.0) | 25.9 (16.9 to 44.8) | 0.367 |
 Medial cortex | 32.5 (19.5 to 47.6) | 44.2 (29.3 to 53.4) | 0.002 |
 Lateral cortex | 29.4 (16.5 to 44.8) | 29.6 (17.3 to 45.8) | 0.579 |