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Table 2 Radiographic comparison between the LIPUS and control groups

From: Low-intensity pulsed ultrasound enhances callus consolidation in distraction osteogenesis of the tibia by the technique of lengthening over the nail procedure

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
  1. LIPUS, Low-intensity pulsed ultrasound
  2. * Values are expressed as mean, with range in parentheses
  3. † Independent t-test