Fig 5. Graft surface roughness and representative measurements.

A) The box plots show the differences of the mean roughness indices ($R_{\tilde{z}}$, μm) between the different graft surfaces. The statistical significances between the different grafts were as follows: p<0.0001 for PET versus OIS, PAD and SAC; ePTFE versus OIS and SAC; OIS versus INV and STD; p = 0.0002 for INV versus SAC; PAD versus SAC, SAC versus STD and INV versus PAD, p = 0.0028 for PET versus ePTFE, p = 0.0173 for PET versus STD; p = 0.0292 for ePTFE versus INV and p = 0.0156 for OIS versus PAD. The lower, mid and upper horizontal lines of the boxes represent 25^th, 50^th and 75^th percentiles, respectively; the vertical lines extend from the 10^th to the 90^th percentile. B) Image shows the calculation for $R_{\tilde{z}}$ on the resliced CLSM stack for STD graft. The red line indicates the surface depth measured for each sub-division of the image. *p<0.05, **p<0.01, ***p<0.0001.