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/cm^2)
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

Data are mean ± SD. , statistically significant difference when compared to 20s.