Biomechanical properties of skin on forearm, shoulder, and back in healthy controls and patients with limited and diffuse SSc
| Control Mean (SD) | lcSSc Mean (SD) | dcSSc Mean (SD) | |
|---|---|---|---|
| *p<0.05; †p<0.005. | |||
| VED, viscoelastic deformation; ED, elastic deformation; UD, ultimate deformation; PDR, pressure-deformation ratio. | |||
| Forearm | |||
| VED (mm) | 0.06 (0.01) | 0.05 (0.02) | 0.049 (0.01)† |
| ED (mm) | 0.49 (0.2) | 0.38 (0.1)* | 0.27 (0.09)† |
| UD (mm) | 0.54 (0.2) | 0.43 (0.1)* | 0.31 (0.1)† |
| PDR (mm Hg/mm) | 82.99 (29.7) | 114.30 (52.8)* | 182.3 (90.9)† |
| Shoulder | |||
| VED (mm) | 0.07 (0.01) | 0.06 (0.01) | 0.05 (0.01)† |
| ED (mm) | 0.72 (0.2) | 0.4 (0.2)† | 0.39 (0.2)† |
| UD (mm) | 0.79 (0.2) | 0.53 (0.2)† | 0.44 (0.2)† |
| PDR (mm Hg/mm) | 48.9 (16.8) | 86.9 (32.6)† | 139.0 (53.8)† |
| Back | |||
| VED (mm) | 0.07 (0.01) | 0.07 (0.01) | 0.06 (0.008)† |
| ED (mm) | 0.56 (0.13) | 0.51 (0.2) | 0.38 (0.1)† |
| UD (mm) | 0.63 (0.13) | 0.58 (0.02) | 0.43 (0.01)† |
| PDR (mm Hg/mm) | 74.71 (24.4) | 82.22 (28.9) | 107.56 (33.4)† |