Table 2.
Clinical and Uutrasound characteristics of keloids at different stages.
| G1: Active stage (n = 28) |
G2: Inactive stage (n = 15) |
P | |
|---|---|---|---|
| Duration, month | 95.0 ± 48.5 | 144.1 ± 49.2 | 0.003** |
| Clinical evaluation | |||
| VSS | 10.1 ± 1.8 | 5.5 ± 3.7 | <0.001** |
| Pigmentation | 2.6 ± 0.6 | 1.1 ± 1.1 | <0.001** |
| Vascularization | 2.0 ± 0.7 | 1.1 ± 1.1 | 0.006* |
| Pliability | 2.7 ± 0.7 | 1.7 ± 1.1 | 0.005* |
| Height | 2.9 ± 0.9 | 1.7 ± 1.3 | 0.003** |
| GSUS assessments | |||
| Total thickness (mm) | 5.4 ± 1.8 | 5.7 ± 3.8 | 0.743 |
| Thickness above the skin (mm) | 3.0 ± 1.6 | 2.0 ± 1.9 | 0.042* |
| Thickness penetrating into the skin (mm) | 2.5 ± 1.7 | 3.7 ± 3.8 | 0.481 |
| Length at transverse section (mm) | 40.4 ± 17.7 | 36.4 ± 33.8 | 0.080 |
| Length at longitudinal section (mm) | 19.3 ± 10.8 | 16.6 ± 9.5 | 0.682 |
| Vascularity assessments | |||
| PSV (cm/s) | 3.0 ± 1.0 | 3.2 ± 1.2 | 0.664 |
| RI | 0.4 ± 0.1 | 0.5 ± 0.1 | 0.049* |
| Elasticity assessments | |||
| K Cs max (m/s) | 8.2 ± 1.6 | 6.6 ± 1.7 | 0.008* |
| K Cs mean (m/s) | 6.2 ± 1.8 | 5.5 ± 1.7 | 0.306 |
| K Cs min (m/s) | 4.2 ± 2.3 | 4.2 ± 1.7 | 0.709 |
| K/A Cs max | 2.4 ± 0.6 | 1.7 ± 0.6 | 0.004** |
| K/A Cs mean | 1.9 ± 0.7 | 1.5 ± 0.5 | 0.041* |
| K/A Cs min | 1.5 ± 0.8 | 1.3 ± 0.5 | 0.609 |
| PAI assessments | |||
| SO2 within the keloid | 78.1 %±4.7 % | 82.8 %±2.3 % | 0.001** |
| SO2 below the keloid | 90.7 %±3.7 % | 92.2 %±1.8 % | 0.102 |
VSS: Vancouver Scar Scale, GSUS: gray scale ultrasonography, PSV: systolic peak velocity, RI: resistance index, Cs: surface wave speed, K: keloid, K/A: ratio of keloid to adjacent skin, SO2: oxygen saturation.
*
P < 0.05.
**
P < 0.005.