Table 2.
Mean ± SD (n = 14) and statistical significance of skin hydration, apparent skin pH, and chroma a* measurements a
| Parameter | Zone | Time | Significance (P value) | |
|---|---|---|---|---|
| Day max | Day recovery | |||
| Skin hydration (a.u.) | 2L | 41 ± 12 | 45 ± 7 | NS (0.451) |
| 2R | 41 ± 12 | 45 ± 8 | NS (0.116) | |
| 3 | 40 ± 14 | 42 ± 12 | NS (0.087) | |
| 4 | 47 ± 10 | 53 ± 10 | P = 0.007 | |
| Apparent skin pH (a.u.) | 2L | 4.7 ± 0.4 | 4.7 ± 0.4 | NS (0.551) |
| 2R | 4.7 ± 0.2 | 4.7 ± 0.3 | NS (0.208) | |
| 3 | 4.7 ± 0.3 | 4.7 ± 0.3 | NS (0.505) | |
| 4 | 5.1 ± 0.4 | 5.0 ± 0.3 | NS (0.480) | |
| Chroma a* (a.u.) | 2L | 20.90 ± 1.74 | 19.77 ± 2.08 | P = 0.019 |
| 2R | 20.72 ± 2.44 | 19.64 ± 2.07 | NS (0.064) | |
| Scoring D‐Squames® | 2 | 2.25 | 2.50 | NS (0.078) |
| Chroma C* (a.u.) | 2 | 11.58 ± 3.86 | 14.36 ± 2.67 | P = 0.041 |
a.u., arbitrary units; L, left; NS, not significant; R, right; SD, standard deviation.
a
Squamometrical data are expressed in median values for the D‐Squame® scorings and a.u. for the chroma C* measurements. Results are ranked by facial skin zones as recorded on day max and day recovery. Statistical evaluation by non‐parametric Wilcoxon signed‐rank test; significant difference P < 0.05.