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Baseline characteristics of the 30 female subjects
| Age (years), mean ± SD | 36.1±5.3 |
| Fitzpatrick skin type, n (%) | |
| III | 6 (20.0) |
| IV | 24 (80.0) |
| Skin color, n (%) | |
| Tan | 30 (100.0) |
| Presence of acne blemishes on face, n (%) | |
| Mild | 30 (100.0) |
| Width of forehead, n (%) | |
| Average | 27 (90.0) |
| Wide | 3 (10.0) |
| Oiliness or dryness of face skin, n (%) | |
| Fairly oily | 17 (56.7) |
| Fairly dry | 13 (43.3) |
| Homogeneity of facial skin color, n (%) | |
| Homogeneous | 30 (100.0) |
Abbreviation: SD, standard deviation.
