Research Article
Evaluation of Hair Density and Hair Diameter in the Adult Thai Population Using Quantitative Trichoscopic Analysis
Table 3
Comparisons of hair density and hair diameter with aging among different scalp sites.
| Age group | Frontal | Vertex | Temporoparietal | Occipital |
| Hair density (hairs/cm2) | 20s | 156.2 ± 12.8 | 164.9 ± 12.7 | 135.9 ± 12.6 | 162.5 ± 12.7 | 30s | 155.4 ± 13.4 | 163.9 ± 13.6 | 134.6 ± 13.8 | 161.5 ± 13.3 | 40s | 154.1 ± 10.2 | 162.3 ± 10.5 | 133.3 ± 10.2 | 160.1 ± 10.3 | 50s | 149.3 ± 11.3 | 158.1 ± 11.8 | 128.5 ± 11.3 | 155.6 ± 11.4 | 60s | 146.7 ± 14.5 | 155.6 ± 14.5 | 125.7 ± 13.7 | 152.7 ± 14.5 |
| Hair diameter (μm) | 20s | 81.4 ± 4.4 | 81.1 ± 4.5 | 80.1 ± 4.6 | 80.6 ± 4.9 | 30s | 80.9 ± 5.4 | 80.5 ± 5.6 | 78.2 ± 5.2 | 80.3 ± 5.4 | 40s | 80.2 ± 5.2 | 80.1 ± 5.3 | 79.6 ± 4.5 | 79.1 ± 5.6 | 50s | 80.7 ± 5.2 | 80.4 ± 5.2 | 79.9 ± 5.1 | 79.8 ± 5.5 | 60s | 82.4 ± 4.6 | 82.2 ± 4.8 | 81.2 ± 5.3 | 81.2 ± 4.4 |
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Data are mean ± SD. , statistically significant difference when compared to 20s. |