Table 3.
Summary of the in vivo analysis of the viable epidermis and DPZ
| Analysis summary | ||
|---|---|---|
| P value | ||
| Age (C) | Age*race | |
| Minimum thickness of viable epidermis | NS | NS |
| Maximum thickness of viable epidermis | P < .05 | P < .05 |
| Average area of granular cell | NS | P < .05 |
| Average area of granular nucleus | P < .05 | P < .05 |
| NC ratio of granular cell | NS | NS |
| Average area of basal cell | P < .001 | NS |
| Average area of basal nucleus | P < .001 | NS |
| NC ratio of basal cell | NS | NS |
| Depth of DPZ | P < .001 | P < .01 |
| DP volume per unit area | P < .01 | P < .01 |
| DP volume ratio within DPZ | P < .05 | NS |
| 3D interdigitation index | P < .01 | NS |
| 2D collagen density in DP | NS | NS |
| Collagen volume in DP per unit area | P < .01 | NS |
Note: Age (C) summarizes correlation with age in Caucasian subject based on linear regression analysis. P value for age (C) is calculated by anova while P value for age*race is calculated by ancova. The interaction between age and race is denoted as age*race.
Abbreviation: NS, not significant.